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

ASSISTANT: Hello, how may I aid you today?

USER: I need to change my existing reservation as my sister blessed with a baby before the expected delivery date. Can you please help me in that?

ASSISTANT: Sure, we are here to assist you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.