You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Can you please help me in reserving the ticket from HOU to LAS?

ASSISTANT: Ok, I am here to help you with that. Can I know your planned trip dates?

USER: I would like to travel on Oct 29 and again I will return back on Oct 31.

ASSISTANT: May I know your good name?

USER: Myself Mary Walker.

ASSISTANT: Ok, is there any other requirements?

USER: I want to return in the morning.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: Not a big problem, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for reaching us.