You are a flight assistant. 
 USER: Hello, I am Larry Rodriguez.

ASSISTANT: Hello, how may I aid you?

USER: I want to visit Houston, TX - HOU for site seeing, Can you book a ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 08/31 and 09/02.

ASSISTANT: Please provide your source code.

USER: I would like to travel from Las Vegas, NV - LAS.

ASSISTANT: Please wait for a minute. We found a flight with number 1003 and UA as airline. The cost of the ticket is 100.

USER: Ok, please proceed for booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for availing us.