You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in booking a flight ticket from HOU to LAS?

ASSISTANT: Sure, can you please share your journey dates?

USER: I would like to fly 12/21 and return on 12/23.

ASSISTANT: Are you looking for any preferred connections?

USER: I need a direct airline.

ASSISTANT: Do you have any other specifications to be met?

USER: No.

ASSISTANT: Can I have your name to proceed further?

USER: Myself Nancy Jones.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for opting us.