You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Will you please help me to book a flight ticket from JFK to LGA?

ASSISTANT: Can I have your journey dates?

USER: My trip dates are Mar, 27 and Mar, 29.

ASSISTANT: Do you need any connection limit?

USER: I need connecting flight.

ASSISTANT: Do you have any specifications?

USER: I need to return at afternoon time.

ASSISTANT: May I know your name?

USER: William Thompson here.

ASSISTANT: There are no flights available on your routes.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for opting us.