Hi.
user
Hello. How can I aid you?
assistant
I want to change my existing reservation. Can you help me for this one?
user
Sure, We are here to help you. May I know your name?
assistant
Sure, Margaret Thompson here.
user
Give me a minute.
assistant
Sure.
user
 Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to change it.
assistant
No issues, thank you for the information.
user
Thank you for reaching us.
assistant