You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I am Nicole Roberts, I want to change ,my existing reservation as my tour got postponed. Please help me.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

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

USER: No problem, thank you for the information.

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