You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Gary King. I want to change my existing reservation as I met with an accident and I am unable to travel. Can you help me, Please?

ASSISTANT: Sure, please wait for a minute, let me check and revert you.

USER: Sure.

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

USER: OK. Thank you, For your help and support.

ASSISTANT: Thank you, for reaching us.