Hello, I am Pamela  Mitchell.
user
Hello, how can I help you?
assistant
As my plan to meet my friend got postponed, I want to change my existing reservation. Can you help me with it?
user
OK, please wait for few minutes.
assistant
Sure.
user
Sorry, to you that there is no reservation found on your name.
assistant
Ok, thank you for the information.
user
Thank you, for reaching us.
assistant