You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Patricia Carter, I want to change my reservation as my plan to meet my friend is postponed. Please help me with that?

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Ok, thank you for the information.

ASSISTANT: Thanks for reaching us, have a good day.