You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Shirley Clark here.

ASSISTANT: Clark, how may I assist you?

USER: Can you please help me in booking the ticket from JFK to LAS? As I'm planning to visit Las Vegas.

ASSISTANT: Sure, can you please let me know your trip dates?

USER: Sure, my planned departure and return travel dates are 06/17 and 06/19.

ASSISTANT: Flight-1012 is available with Spirit airlines and the ticket fare is 700 only. Can I book the ticket for you?

USER: Can you please search for the flights in which the ticket cost doesn't exceeds 200.

ASSISTANT: Clark, there is no flight available with ticket fare under 200.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: You are welcome and thank you for choosing us.