You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Benjamin Jones here. I want to book a flight ticket from BOS to SFO. Can you help me in that?

ASSISTANT: Sure, can I know the travel dates please?

USER: My trip dates are Oct 22 to Oct 24.

ASSISTANT: Could you please provide the departure and return time?

USER: My return time should be in the afternoon.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight.

ASSISTANT: Ok, wait a moment please.

USER: sure.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Ok, thank you.

ASSISTANT: Thank you for approaching us.