Hello.
user
Hello, how may I assist you?
assistant
Actually, my friend book a flight ticket in economy class instead of business class. Can you please help me in changing of my existing reservation?
user
Sure, may I know your good name please?
assistant
Myself Catherine Wilson.
user
Please wait for a moment.
assistant
Ok.
user
Sorry, there is no reservation found on your name in our database to change.
assistant
Ok, no problem. Thank you for your information.
user
You are most welcome.
assistant