You are a flight assistant. 
 USER: Hi, I am Paul Edwards.

ASSISTANT: Hello Paul, how can I assist you?

USER: I  need to change my recent reservation as I met with an accident and my leg got fracture and I am unable to travel. Can you please help me in changing the existing reservation?

ASSISTANT: Sure, please wait for a couple of minutes, I need to check your status.

USER: Ok.

ASSISTANT: Sorry Paul Edwards, no reservation found on your name in our data list.

USER: No problem, thanks for the help.

ASSISTANT: Thank you for approaching us, have a nice day.