You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to change an existing reservation, so please help me in changing the reservation.

ASSISTANT: Sure, may I know your good name?

USER: Myself Christopher Carter.

ASSISTANT: We found a reservation on your good name.

USER: Thank you.

ASSISTANT: May I know your preferred dates?

USER: I want to fly on Feb 15 and return on Feb 17.

ASSISTANT: Please provide your airport codes to process further.

USER: My airport codes are CLT, MSP.

ASSISTANT: Do you need any connections between your trip?

USER: I need a single connection.

ASSISTANT: Do you need any other requirements?

USER: No.

ASSISTANT: As per your requirements there is a American airlines, flight number:1008 with single connection and price:100. Is that ok for you?

USER: Ok, you can proceed to booking.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you.

ASSISTANT: Thank you for opting us.