You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this moment?

USER: Could you help me in booking a flight ticket from BOS to JFK?

ASSISTANT: Sure, provide me your travel dates?

USER: I want to fly on Apr 02, return on Apr 04.

ASSISTANT: Ok, do you prefer any class?

USER: I need a connecting flight.

ASSISTANT: Sure, we assist you in that.

USER: Ok.

ASSISTANT: Any other specifications do you have?

USER: No.

ASSISTANT: Can I know your name?

USER: My name is Nancy Jackson.

ASSISTANT: Based on your specifications we have not found any flight.

USER: No problem, thank you.

ASSISTANT: Thanks for reaching us.