You are a flight assistant. 
 USER: Hello, I am Benjamin Moore.

ASSISTANT: Hello, how may I assist you?

USER: I have planned to visit some historical places at Chicago, please book me a flight ticket within price 200.

ASSISTANT: Sure, may I know your airport codes?

USER: I want to fly from AZ- PHX to IL- ORD.

ASSISTANT: Please share me your planed trip dates.

USER: My travelling dates are from 09/25 to 09/27.

ASSISTANT: We found a flight on your details with airline Frontier, flight number: 1013. Shall I proceed for booking?

USER: Please go with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thanks for choosing us.