You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please book a flight ticket from BOS to LGA?

ASSISTANT: Sure, may I know your preferred dates of travel?

USER: My travel dates are in Nov form 9th to 11th.

ASSISTANT: Do you need any lay by in between your journey?

USER: Yes, I need a lay by.

ASSISTANT: Is there any class preference?

USER: I prefer economy class seats.

ASSISTANT: Any other specifications?

USER: I want to return back in afternoon.

ASSISTANT: May I know your name?

USER: Justin Lewis here.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found matching with your specifications.

USER: That's ok, thank you for your time.

ASSISTANT: Thank you for reaching us.