You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I need to book a flight ticket from BOS to SFO, Can you please help me for booking?

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: I would like to travel on 08/13 to return on 08/15.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I need a business class with depart on afternoon.

ASSISTANT: Ok, please share your name.

USER: Amy Thompson here.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.