You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to meet my friend at San Francisco, SFO. Could you please help me with booking a flight ticket from JFK?

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

USER: My planned travel dates are from Apr 21 to Apr 23.

ASSISTANT: Ok, please mention your name.

USER: Sure, myself Catherine White.

ASSISTANT: May I know your connection limit?

USER: I need a flight with single connection limit.

ASSISTANT: Do you have any specification?

USER: I would like to return in the Evening time.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Not an issue, anyway thank you for the information.