You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Anna Collins. Due to sudden demise of my uncle, I need to change my reservation. Can you please help me?

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Have a nice day.