You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I best serve you today?

USER: I need to change my existing reservation owing to an emergency.

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: My name is Paul Parker.

ASSISTANT: I found your reservation please share your trip dates.

USER: Departure is by Aug, 17 and return date is Aug, 19.

ASSISTANT: May I know your nearest airport codes?

USER: Airport codes are IAH and MSP.

ASSISTANT: Do you have any connection limit preferences?

USER: I would be comfortable with single stop over.

ASSISTANT: Is there any other concern?

USER: I prefer business class.

ASSISTANT: May I know your name please?

USER: My name is Paul Parker.

ASSISTANT:  There is a flight in Frontier Airlines with the ticket price of 200 having one connection and business class. Can I proceed to booking?

USER: Please book a flight.

ASSISTANT: Your booking is confirmed and the flight number is 1023.

USER: Thank you.

ASSISTANT: Thank you for choosing us.