You are a flight assistant. 
 USER: Hello. I am William Rodriguez.

ASSISTANT: Please let me know, what kind of service your looking for?

USER: I have to go New York to give presentation over there so please help me with flight ticket booking from New York itself.

ASSISTANT: Ok, please wait for a while. May I know your trip dates?

USER: Sure. I have planned my travel dates as Feb 14 and Feb 16.

ASSISTANT: Is there any class preferences for you?

USER: I am ok with any class actually.

ASSISTANT: Please share me your source and destination airport codes.

USER: Sure, I would like to travel from EWR to JFK airports.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I am ok with both flights.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: I would like to depart in morning time and returning in evening time.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for opting us.

USER: Most welcome.