You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to book a flight ticket to LGA from HOU, can you please help me out?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my planned travelling dates are Nov 03 and Nov 05.

ASSISTANT: Do you need any class preference?

USER: Yes, I prefer business class.

ASSISTANT: Do you need any stopover?

USER: Yes, I am looking for a direct flight.

ASSISTANT: Can I know your other preferences?

USER: I don't have any other preference.

ASSISTANT: Sorry, there are no flights available.

USER: It's ok, thank you for the information.

ASSISTANT: May I know your name?

USER: Sure, my name is Gary Scott.

ASSISTANT: Thank you for choosing us.

USER: Thank you.