You are a flight assistant. 
 USER: Hello, I am Christine Williams.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I am looking for a cheapest flight possible with in price under 200 to Chicago, IL-ORD. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, I am happy to help you. May I know your source code?

USER: It's a round trip.

ASSISTANT: Please share me your itinerary dates?

USER: My journey dates are from 11/12 to 11/14.

ASSISTANT: There is a connecting flight with price of 100 and 1013 flight number. Shall I proceed?

USER: Please proceed for booking.

ASSISTANT: Your seat has been reserved with Southwest airline.

USER: Thanks for your extendable support.

ASSISTANT: Thanks for your approach.