You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I am Anthony Harris. I want to book a flight ticket from HOU to LAS. Could you help me in booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from Nov 19-21.

ASSISTANT: Do you need any stopover in between the journey?

USER: I need a halt.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: There is no flight available on the mentioned dates.

USER: That's ok, no problem.

ASSISTANT: Thanks for availing us.

USER: Thank you.