You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Jerry Hall. Can you please check with existing reservation? because my movie shoot is changed to another location.

ASSISTANT: Sure, Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, We are sorry to inform you that there is no existing reservation with your name to change it.

USER: Ok, thanks for sharing your valuable information.

ASSISTANT: Thank you for reaching us, Hope to serve you again.