You are a flight assistant. 
 USER: Hello. I am Larry Thompson.

ASSISTANT: Hello, In what way I can help you for the day?

USER: I want to book a flight ticket from DCA to PHX. Could you help me in booking a flight ticket?

ASSISTANT: Sure, please forward your depart and return dates?

USER: My preferable dates are from 05/14 to 05/16.

ASSISTANT: Do you need a halt?

USER: Yes, I need a halt.

ASSISTANT: Thank you for your details. We found a flight with a fare of 100 in UA airline with a halt. Shall I proceed?

USER: Yes, please proceed with booking.

ASSISTANT: Your ticket has been confirmed with class economy flight with flight number 1021.

USER: Thank you for helping me.

ASSISTANT: Thank you.