You are a flight assistant. 
 USER: Hello, I am Janet Campbell.

ASSISTANT: Hello, How may I assist you today?

USER: Due to sudden illness of my grandfather, I want to change my reservation.

ASSISTANT: Ok, please wait a moment, I will check with the reservation list.

USER: Ok.

ASSISTANT: I have checked with flight reservation list, but we do not find any reservation on you name.

USER: Ok, not an issue. Thank you for information.

ASSISTANT: Thanks for reaching us, Have a nice day.