Portuguese Phrase
Posso mudar os detalhes da minha reserva?
Meaning
A polite request asking whether it is possible to change the specifics of one’s reservation—such as dates, room type, or guest name. The sentence uses the modal verb ‘poder’ to convey permission rather than a demand.
When to use
Use this phrase when you call or email a hotel, airline, restaurant, or any service where you have a booked reservation and need to adjust the details. It works both in formal written communication and in spoken conversation with staff.
✦Grammar Breakdown
Possomudarosdetalhesdaminhareserva?
Posso (poder)
First‑person singular present of the modal verb poder, used to ask permission or possibility.
mudar (infinitive)
The base form of the verb ‘to change’; after a modal verb, the infinitive is required.
os (definite article)
Plural masculine article that agrees with ‘detalhes’.
da (de + a)
Contraction of the preposition de and the feminine singular article a, linking ‘detalhes’ to ‘reserva’.
minha (possessive adjective)
First‑person singular possessive that agrees in gender and number with ‘reserva’.
🗨In Conversation
Posso mudar os detalhes da minha reserva?
Can I change the details of my reservation?
Claro, quais alterações você gostaria de fazer?
Sure, what changes would you like to make?
✕Common Mistakes
Posso mudar os detalhe da minha reserva?
‘Detalhe’ is singular; the article must match the noun’s number. Use ‘os detalhes’ for plural.
Posso muda os detalhes da minha reserva?
After a modal verb, the verb must stay in the infinitive form ‘mudar’, not conjugated.
Posso mudar os detalhes de minha reserva?
The preposition ‘de’ contracts with the feminine article ‘a’ to become ‘da’. Dropping the contraction sounds unnatural.
↔Alternatives
É possível alterar os detalhes da minha reserva?
Is it possible to alter the details of my reservation?
Gostaria de modificar as informações da minha reserva.
I would like to modify the information of my reservation.
Posso fazer ajustes na minha reserva?
Can I make adjustments to my reservation?
Cultural Tip
In Brazil, adding ‘por favor’ before or after the request makes it sound even more courteous: ‘Posso mudar os detalhes da minha reserva, por favor?’ Also, staff may ask for the reservation code (código da reserva) before proceeding, so keep it handy. In Portugal, you’ll hear a slightly more formal tone, often using ‘poderia’ instead of ‘posso’.