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

ASSISTANT: Hello. How can I serve you today?

USER: I am planning to visit my friends house in Las Vegas, Can you help me out in booking a ticket with a single conection?

ASSISTANT: Sure. May I know your airport codes?

USER: My source is TX - HOU and destination is NV - LAS.

ASSISTANT: Ok, Please share your journey dates.

USER: I start on 07/15 and return on 07/17.

ASSISTANT: Ok, There is no flight found with your data.

USER: OK, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thanks for the response.