You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, can you please share your trip dates?

USER: I would like to travel on Apr 18 and return on Apr 20.

ASSISTANT: Do you have any connection limit?

USER: I need connecting flight.

ASSISTANT: Let me know your class preference?

USER: I prefer economy class.

ASSISTANT: May I know your name please?

USER: William Garcia here.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.