Hello.
user
Hello, how may I help you?
assistant
I want to do some changes in my existing reservation. Can you help me for that?
user
Sure, let me know your name please.
assistant
My name is Edward Brown.
user
Please wait for a while.
assistant
Sure, I will wait for your response.
user
Sorry, there is no reservation found with your name.
assistant
That's ok, thank you for checking.
user
Most welcome.
assistant