You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Margaret Allen. I want to book a flight ticket from LAS to PHX, can you please help?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I will depart om Nov 11 and return back on Nov 13.

ASSISTANT: Do you need a halt in between your journey?

USER: I want a halt during my flight.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.