You are a flight assistant. 
 USER: Hi. I am John Mitchell.

ASSISTANT: Hello. How may I serve you today?

USER: I need to book a flight ticket from PHX it's a round trip, Can you please help me for booking?

ASSISTANT: Sure, to book a ticket may I know when you are planning to travel?

USER: I would like to travel on 12/02 to return on 12/04.

ASSISTANT: Please provide your specifications.

USER: I need a direct flight in between my journey.

ASSISTANT: We found a direct flight with an airline UA of flight 1013 and cost is 200. Can I proceed with the booking?

USER: Ok, proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your information.

ASSISTANT: Thank you for opting us.