You are a flight assistant. 
 USER: Hello. I'm Stephen Young.

ASSISTANT: Hello Stephen , how may I help you?

USER: I want to visit a historical place in Phoenix.Can you book a ticket from TX - DFW to AZ - PHX?

ASSISTANT: Can I know your journey dates?

USER: I want to depart on 01/28 and return by 01/30. The connection limit is 1.

ASSISTANT: I found a flight which is matched with your request. Can I proceed?

USER: Can I know price?

ASSISTANT: Price is only 100.

USER: Proceed with the booking.

ASSISTANT: Ok. Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you to visit us.