You are a flight assistant. 
 USER: Hello, I am Thomas Carter.

ASSISTANT: Hello, how may I help you?

USER: I would like to book a flight ticket to Houston, TX - HOU within the price of 200. Can you help me in this?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are 07/01 - 07/03.

ASSISTANT: Kindly provide your source code.

USER: I want to fly from Boston, MA - BOS.

ASSISTANT: We found a flight with number 1027 and UA as airline. The cost of the ticket is 200.

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you for your service.

ASSISTANT: Thank you.