You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need a flight ticket booking from LAS to HOU to attend a meeting, can you please assist me with flight ticket  booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to take off on Jan 28 and I will arrive back on Jan 30.

ASSISTANT: Can I know class preference?

USER: I need a business class flight.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection flight.

ASSISTANT: May I know your flight timing?

USER: I would like to depart in the morning time.

ASSISTANT: Could you please provide your name?

USER: My name is Stephen Young.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, currently there are no flights available.

USER: Sad to hear that one, I can prefer any other source to reach my location. Thank you for your help.

ASSISTANT: Thank you for approaching us.