You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please change my existing reservation, due to an emergency?

ASSISTANT: Sure, please share your good name?

USER: My name is Catherine Young.

ASSISTANT: We are glad to inform you that we found a reservation on your name, please share your trip dates?

USER: My journey dates are on Apr 28th and 30th.

ASSISTANT: Do you need a connecting flight?

USER: I prefer business class. Yes, I need a connecting flight.

ASSISTANT: Which airports do you want to fly?

USER: My airport codes are, DEN to PHL.

ASSISTANT: Thank you for your details, we found a connecting flight 1025 in class business. Shall I proceed with a Delta airline?

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you.