Hi. I am Jack Anderson.
user
Hello, how could I serve you?
assistant
I want to change an existing reservation due to sudden change in my trip. Can you help me?
user
Sure, give me sometime to check and get back to you.
assistant
Ok.
user
Thank you for your time. Unfortunately there is no reservation found according to your name.
assistant
No issue. Thank you.
user
Thank you for availing us.
assistant