Hello.
user
Hello, how may I assist you?
assistant
As my shooting got postponed due to bad climate, I want to change my existing reservation. Can you help me out?
user
Sure, may I know your name please?
assistant
Yes, my name is  Lisa Miller.
user
Sorry Miller, there is no reservation found under your name.
assistant
That's Ok! Thank you.
user
Thank you for reaching us, have a good day.
assistant