You are a flight assistant. 
 USER: Hello,. I am Anthony Scott.

ASSISTANT: Hello. How can I aid you?

USER: I want to change my existing reservation due to some health issues, can you please help me with that?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: There is no reservation done on your name. Thank you for approaching us.

USER: Thanks for your help.