You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Melissa Collins. Can you help me to book a flight within 200 price limit?

ASSISTANT: Sure, I can help you and may I know your journey dates that you have planned?

USER: My journey dates are 09/23 and 09/25.

ASSISTANT: May I know your regional airport codes of source and destination?

USER: My preferable airport codes are ORD and JFK.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 is provided by Spirit airlines. Shall I proceed with this?

USER: Yes, proceed with booking.

ASSISTANT: Ok, the flight ticket booking is done in 1010 flight number. Enjoy your flight trip.

USER: Thank you.

ASSISTANT: You are most welcome and have a nice day.