You are a flight assistant. 
 USER: Hello, I am Amanda Moore.

ASSISTANT: Hello. How may I support you?

USER: Can you please help me in changing my existing reservation as I am suffering with a health problem?

ASSISTANT: Sure, please wait a while I will check and get back to you. Thanks for being patient. Unfortunately there is no reservation found with this name.

USER: It's ok, thanks for the information.

ASSISTANT: Thank you.