You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Joshua Rodriguez.

ASSISTANT: Nice to meet you Joshua.

USER: I am invited for distribution of certificates at Mills college in OAK, can you book a flight ticket from DEN?

ASSISTANT: Sure, may I know the travel dates please?

USER: I would like travel on 06/30 and return back on 07/02.

ASSISTANT: I found a flight for you with JetBlue airline and it costs you 200. Shall I proceed to reserve a ticket in that flight?

USER: It's a perfect flight. Yes, please book it.

ASSISTANT: Your ticket has been booked with 1022 flight number.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us, have a safe flight.