You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I serve you today?

USER: I have some personal problems that need fixing, so I need to change an existing reservation.

ASSISTANT: Sure, can you please provide your name for further process?

USER: My name is Sharon Wilson.

ASSISTANT: Please stand by I will check and revert you.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, sorry to inform we did not find any reservation with your name.

USER: Not a problem, thank you.

ASSISTANT: Have a nice day.