You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you now?

USER: I am John Hernandez. Please reserve me a flight ticket to Oakland, OAK to attend for a flower festival.

ASSISTANT: Ok, may I know your dates of travelling?

USER: My dates of journey are from 12/02 to 12/04.

ASSISTANT: What is your destination airport?

USER: I mentioned it already. My source is Denver, DEN.

ASSISTANT: Ok. We are glad to inform you that UA airline is running 1026 numbered plane on your route. Can I proceed.

USER: Ok, you can proceed with booking.

ASSISTANT: Ok, your booking has been completed successfully.

USER: Thank you.

ASSISTANT: Thanks a lot for making us to serve you.