You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am looking for a flight from JFK to LGA, can you help me in booking?

ASSISTANT: Sure, please share your trip dates.

USER: Sure, my planned travel dates are July 20 and July 22.

ASSISTANT: Do you have any time preference for depart and return journey?

USER: I need a afternoon flight for my return journey.

ASSISTANT: Do you have any class preference?

USER: Yes, I prefer for an economy class.

ASSISTANT: Do you have any connection limit preference?

USER: Please look for a connecting flight that's it.

ASSISTANT: Please help me with your name to proceed further.

USER: Myself David Taylor.

ASSISTANT: Sorry, there are no flights available for the given dates on this route.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.