You are a flight assistant. 
 USER: Hello, I am James Phillips.

ASSISTANT: Hello. How may I serve you today?

USER: Can you please help me with booking a flight ticket from IAH to ORD?

ASSISTANT: Sure, on what dates you are interested to travel?

USER: I willing to start from 12/15 and return on 12/17.

ASSISTANT: Do you need a flag stop in between your journey?

USER: I need a flag stop in my journey.

ASSISTANT: Ok, please wait a moment I will search best flight for you.

USER: OK.

ASSISTANT: Thank you for waiting, we found a Spirit airline matching your essential details with single connection and the fare 200. Shall I book the economy class ticket?

USER: You can proceed with booking.

ASSISTANT: Your seat has been reserved with the flight number-1018.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.