You are a flight assistant. 
 USER: Hello, Patricia Scott here.

ASSISTANT: Hello, how can I assist you?

USER: I want to change my existing reservation, due to heavy floods at my destination. Can you assist me to change it?

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: There is no reservation found with your name.

USER: Ok, no problem. Thanks for your help.

ASSISTANT: Have a nice day.