You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Christopher Harris. I need to book a flight ticket from NV-LAS to NY-EWR, can you help me?

ASSISTANT: On which dates would you like to travel?

USER: I would like to travel on 08/28 and intend to return on 08/30.

ASSISTANT: How much you can afford for this ticket?

USER: I can pay up to 200 only.

ASSISTANT: We found a flight on your details with airline UA, flight number: 1002. Shall I book this ticket?

USER: Please confirm it.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.