You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you today?

USER: I am Joseph Martin, I want to book a flight ticket under price 500 to reach Philadelphia, PA - PHL.

ASSISTANT: Sure, when do you want to travel?

USER: My departure will be on 12/09 and arrival will be on 12/11.

ASSISTANT: Do you have any connection limit?

USER: I dont have any connection limit.

ASSISTANT: Can I know your destination point?

USER: Yes, it is NY - JFK.

ASSISTANT: Please wait a moment I will check and revert you.

USER: Sure.

ASSISTANT: Thanks for being patient. there is a flight that matches your requirement.

USER: May I know the flight details?

ASSISTANT: The flight details are airline-Spirit flight number-1020 and the price 100.

USER: Ok, please book my ticket.

ASSISTANT: Your reservation has been done.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.