You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Hall.

ASSISTANT: How may I support you now?

USER: To learn some cooking methods, I would like to attend for food festivals at Detroit, DTW.

ASSISTANT: Ok.

USER: Can you assist me in booking a flight ticket on 08/28?

ASSISTANT: Sure, please provide the return date.

USER: I intend to return on 08/30.

ASSISTANT: From which place you are heading?

USER: My boarding point is Oakland, OAK.

ASSISTANT: How much can you afford for your journey?

USER: I can afford up to 5000.

ASSISTANT: There is a flight with 1 connection of price 100 in 1015 flight of Delta airline. May I confirm it?

USER: Please, confirm it.

ASSISTANT: Booking has been done with economy class.

USER: Thank you for your help.

ASSISTANT: Thank you, have a safe journey.