Hi. I am Ronald Adams.
user
Hello, how may I help you today?
assistant
I want to change my reservation due to postpone of my appointment with doctor at Dallas & Fort Worth. Can you help me in my booking?
user
Sure, please wait for a while.
assistant
Sure, I will wait for your response.
user
Sorry, there is no reservation found on your given name.
assistant
Not an issue, thank you for your kind information.
user
Thanks for choosing us.
assistant