Hello, I am Anna Gonzalez.
user
Hello. How can I assist you?
assistant
Due to an emergency meeting, I want to change my reservation. Can you help me with it??
user
 Ok, please wait.
assistant
Ok.
user
 Sorry to inform you that no reservation was found on your name.
assistant
No problem, thank you for the information.
user
 Thank you for reaching us.
assistant