Hello. I am Mark Hall.
user
Hello, how may I assist you now?
assistant
I want to change my reservation due to cancellation of my trip. Will you change my reservation?
user
Sure, I will help you to change your reservation. Please wait for a moment.
assistant
Ok.
user
Thank you for waiting, sorry there is no reservation found on your name.
assistant
Ok, thank you.
user
Thank you for reaching us.
assistant