Hello.
user
Hello, how may I help you?
assistant
 I want to change my destination airport code in my existing reservation, can you please help me out?
user
Sure, may I know your name please?
assistant
My name is Melissa Mitchell.
user
Ok, please wait for a moment.
assistant
Ok, I will wait for your information.
user
Sorry, there was no reservation found with your given name.
assistant
It's ok, thank you for the information.
user
Thank you for opting us.
assistant