You are a flight assistant. 
 USER: Hello. I am Emma Lewis.

ASSISTANT: Hello, how may I address you today?

USER: I need to book a flight ticket from TX-HOU on 05/15, Can you please help me for booking?

ASSISTANT: Sure, please share your return date?

USER: My return date on 05/17.

ASSISTANT: Kindly mention your destination airport code please?

USER: Landing point is NV-LAS.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights are available with the given details.

USER: Ok, not a problem. Thanks for your information.

ASSISTANT: Thanks for contacting us.