You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

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

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: May I know your good name?

USER: Myself Barbara Williams.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, I found your reservation in our system data. Please share me your airport codes?

USER: My airport codes are CLT, PHL.

ASSISTANT: Please mention your planned journey dates?

USER: I want to fly on May 02 and return on May 04.

ASSISTANT: Do you want a connecting flight for this journey?

USER: I need a single connection.

ASSISTANT: Do you have any other requirement?

USER: No.

ASSISTANT: Thank you for the details, I found a connecting flight 1010 of airline Delta, fare is 200 and class is economy. Shall I proceed with booking?

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.