You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service?

USER: I am Karen Thomas. I want to book a flight ticket from DCA to CLT. Could you help me in booking a flight ticket?

ASSISTANT: Sure, please let me know your fare limit for this particular booking.

USER: My price limit is 1000.

ASSISTANT: When are you planning to make your trip?

USER: My planned trip dates are from 01/18 to 01/20.

ASSISTANT: Ok, please give me a moment.

USER: Ok.

ASSISTANT: UA airline with flight number 1014 is going on your way and the fare is 100. Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your booking has been done.

USER: Thank you.

ASSISTANT: Thank you for opting us.