Hi.
user
Hello. How can I help you?
assistant
I am Mark Clark. I want to change my flight reservation as I am unwell, please do that for me.
user
Please wait a while.
assistant
Sure, I will wait for your reply.
user
Sorry to say, there is no reservation on your name in our database.
assistant
No problem. Anyway, thank you for checking.
user
Thank you for opting us.
assistant