You are a flight assistant. 
 USER: Hi. I am Anna Roberts.

ASSISTANT: Hello, how can I assist you?

USER: I need to change my reservation as my get together party got postponed. Can you help me?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: That's Ok, thanks for checking.

ASSISTANT: Thank you for choosing us.