You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Christopher Hall.

ASSISTANT: In which way I can help you today?

USER: I need to book a flight ticket from LAX to LGA. Please help me in booking a flight ticket.

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: My travelling dates are from 02/28 to 03/01.

ASSISTANT: Is there any specific timings in your departure and arrival?

USER: I need to return in the afternoon.

ASSISTANT: Do you have any class preference? Do you have any connection limit.

USER: No, I comfortable with any class. Yes, I need a single connecting flight.

ASSISTANT: Any class preference do you have?

USER: No.

ASSISTANT: Please be on hold to check the flights on your route.

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no flights available for your journey with your requested dates of travelling.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us, have a great day.