German Phrase
Was ist deine Buchungsnummer?
Meaning
Literally, 'What is your booking number?' It is a direct request for the reference number that identifies a reservation, ticket, or hotel stay. The phrase is neutral and can be used in both spoken and written German.
When to use
Use this question when you need to locate a reservation in a system—during phone calls with airlines, hotels, car‑rental agencies, or when confirming details via email. It is appropriate in informal contexts (friends, acquaintances) or when the speaker has already established a casual rapport with the listener.
✦Grammar Breakdown
WasistdeineBuchungsnummer?
Was (interrogative pronoun)
Used to ask 'what' in a question; it stays unchanged regardless of case.
ist (sein, 3rd person singular)
The present tense of 'sein' used here as a copula linking the subject 'Was' with the predicate.
deine (possessive adjective)
Informal singular form of 'your'; it must agree in gender, number, and case with the noun it modifies (here feminine nominative).
Buchungs‑nummer (compound noun)
A compound of 'Buchung' (booking) and 'Nummer' (number); always feminine (die Buchungsnummer).
Question mark
In German, a question is indicated by a trailing '?' and often by inversion (verb before subject).
🗨In Conversation
Was ist deine Buchungsnummer?
What is your booking number?
Meine Buchungsnummer ist 123‑456‑789.
My booking number is 123‑456‑789.
✕Common Mistakes
Was ist dein Buchungsnummer?
The possessive must be declined to match the feminine noun; 'deine' is correct, not 'dein'.
Was sind deine Buchungsnummer?
Do not use plural verb 'sind' because the subject 'Was' is singular.
Was ist deine Buchungs Nummer?
Avoid splitting the compound; it stays together as one word.
↔Alternatives
Wie lautet deine Buchungsnummer?
What is your booking number?
Könntest du mir deine Buchungsnummer geben?
Could you give me your booking number?
Darf ich deine Buchungsnummer haben?
May I have your booking number?
Cultural Tip
In German business or formal settings you would use the polite form 'Ihre' instead of 'deine' – e.g., 'Was ist Ihre Buchungsnummer?'. Also, Germans often repeat the number slowly and in groups of three or four digits to avoid misunderstandings.