You are a flight assistant. 
 USER: Hello, I am Laura Mitchell.

ASSISTANT: Hello, how can I serve you today?

USER: Due change in my plan to visit zoo, I want to change my reservation.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting. We are sorry to inform you that, we did not found any reservation against your name.

USER: Ok, not a issue.

ASSISTANT: Thank you for choosing us. Have a good day.

USER: Thank you for good response.