Hello, Gary Jones here.
user
Hello Gary. What can I do for you?
assistant
Due to sudden official trip announced in our office, I have to do some changes in my existing reservation, can you please help me?
user
Sure, please give me a time for checking your previous details.
assistant
Ok.
user
There is no reservation with your name.
assistant
Ok, that's fine, thank you for giving information.
user
Thank you for coming here.
assistant