Hello.
user
Hello, How can I serve you?
assistant
I want to change my existing reservation due to  some sudden health issues. Can you be my helping hand in this?
user
Sure, May I know your name?
assistant
I am Jason Hernandez.
user
Please wait a second.
assistant
Sure, take your time.
user
Sorry, No reservation found on your name.
assistant
Not an issue, thank you.
user
Thank you for choosing us.
assistant