You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am John Roberts, want to travel from IAD to HOU. Please help me.

ASSISTANT: Sure, I am here to help you. When you are planning to travel?

USER: My trip dates are from 02/16  to 02/18.

ASSISTANT: Just a moment.

USER: Ok.

ASSISTANT: There is a flight with Southwest airlines and the ticket figure is 300. Shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Ok John, your ticket is reserved with the flight-1002.

USER: Ok. Thank you.

ASSISTANT: You are welcome.