You are a flight assistant. 
 USER: Hello. I am Amy Anderson.

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my existing reservation, due to some health issue. Can you please help me out?

ASSISTANT: Sure, please wait while I check for your reservation.

USER: Thank you.

ASSISTANT: Sorry, there was no active reservation found on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for contacting us.