Hello.
user
Hello, how may I serve you?
assistant
Please help me to change my existing reservation as I need economy class ticket instead of business class. Can you please help me with this?
user
Sure, we are glad to help you.
assistant
Thank you.
user
May I know your good name?
assistant
Sure, I am Christopher Roberts.
user
We are sorry to inform you that, there is no active reservation on your name.
assistant
Ok, Thank you for your help.
user
Thank you for opting us.
assistant