You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I am Raymond Gonzalez, I would like to travel from TX-HOU to NV-LAS. Can you please help me to book a flight ticket?

ASSISTANT: Sure, Can you help me with your journey dates please?

USER: My journey dates are from 09/15 to 09/17.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thank you for waiting.

USER: No, problem.

ASSISTANT: Sorry, We did not find any flight based on your given requirements.

USER: Ok, no problem, thanks for your information.

ASSISTANT: Thank you for reaching us.