You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you?

USER: I am Ronald Green, want to cancel my recent reservation due to some personal issues. Please help me out with that.

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: No reservation found in our data base on your name.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you.