You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Please help me to book a flight ticket from JFK to SFO.

ASSISTANT: Sure, can you share your trip dates?

USER: My journey dates are from Feb, 10 to Feb, 12.

ASSISTANT: Do you prefer either connecting or direct flight?

USER: I need a single connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: Andrew Lee.

ASSISTANT: Sorry, there are no flights found on your specified trip dates.

USER: Thank you.

ASSISTANT: Thank you for availing us.