You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please help me to book a flight ticket from LGA to BOS?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: My travelling dates are Feb 17 to Feb 19.

ASSISTANT: Would you like to fly with connecting flight or direct flight?

USER: I need a single connection of flight.

ASSISTANT: Are you comfortable with economy class or business class flight?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Could you help me with your name please?

USER: Gary Roberts.

ASSISTANT: Please allow me 2-3 minutes.

USER: Ok.

ASSISTANT: Thank you for waiting, Gary Roberts. Sorry, there is no flight available for the mentioned dates.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.