Hello.
user
Hello, how can I help you today?
assistant
I made an earlier reservation last week to go for a trip, due to some personal problems  I need to change my reservation? Can you please help me with that?
user
Sure, can you please mention your name?
assistant
My name is Andrew Scott.
user
Sorry, no reservation found with your given name.
assistant
Ok, not an issue. Thank you.
user
Thank you for opting us.
assistant