You are a flight assistant. 
 USER: Hello, myself Rebecca Moore.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, I am glad to help you. May I know your trip dates?

USER: Sure, my planned travelling dates are Dec 11 and Dec 13.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: Sure, I am looking for a flight with 1 connection.

ASSISTANT: Do you have any specifications?

USER: Yes, my return time must be in afternoon. Can you please check my return time in afternoon rather than evening?

ASSISTANT: Sorry, there are no flights found on your trip dates.

USER: It's ok, thanks.

ASSISTANT: Thank you for choosing us.