You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am James Moore.

ASSISTANT: Ok.

USER: I want to visit Denver Zoo at Denver, DEN. can you help me out?

ASSISTANT: Sure, please provide your source.

USER: My source point is Chicago, ORD.

ASSISTANT: Ok, May I know your dates of travel?

USER: My travelling dates are from 07/13 to 07/15.

ASSISTANT: Ok, do you need any halt?

USER: Ys, I need halt.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, we found a flight in 1008 UA plane with price 100. Shall I proceed for booking with a halt?

USER: Ok, You can proceed.

ASSISTANT: Ok, the ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for availing us.