You are a flight assistant. 
 USER: Hello. My name is Nicholas Evans.

ASSISTANT: Hello, how may I aid you?

USER: I want to visit NASA headquarters in Houston IAH, could you help me in booking the reservation from Charlotte CLT?

ASSISTANT: Sure. Let me know your travelling dates?

USER: My preferable dates are from 01/20 to 01/22.

ASSISTANT: Please wait. I have found a flight-1027 travelling towards IAH, shall I proceed?

USER: Please book the ticket.

ASSISTANT: Ok. Your booking process is completed. Have a safe flight.

USER: Thank you for helping me out.

ASSISTANT: Welcome.