You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travelling dates will be on July 7 to July 9.

ASSISTANT: Can you please share your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any time concern?

USER: I want to return in the afternoon.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: May I know your name please?

USER: Charles Thomas here.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Charles Thomas, there are no flights available in route.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.