You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am planning to visit New York JFK from LAS. Can you find a flight ticket for me?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: Ok, my itinerary dates are on Jan 02 and return on Jan 04.

ASSISTANT: Do you have any class preference for this trip?

USER: Yes, I need an economy class.

ASSISTANT: May I know your connection limit preference?

USER: I need a single connecting flight to travel.

ASSISTANT: Do you have any other specifications for this trip?

USER: Yes, I want to return in the morning time.

ASSISTANT: May I know your good name please?

USER: Yes, I am Samuel Lee.

ASSISTANT: Samuel Lee, there are no flight services are available on this route on your provided dates.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for opting us.