You are a flight assistant. 
 USER: Hello. I am Paul Jones.

ASSISTANT: Hello. How can I help you?

USER: Due to sudden work, I want to change my reservation. Can you please help me with it?

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry we didn't find any reservation on your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us, have a good day.