You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, can I have your name?

USER: I want to change the ticket of my friend, as my friend was met with an accident. So, please change the reservation with the name of Jonathan Jackson.

ASSISTANT: Ok, Please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found with your name.

USER: Thank you for your information.

ASSISTANT: Have a good day.