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

ASSISTANT: Hello, How can I aid you?

USER: I want change my existing reservation, can you help me with it?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting, but no reservation on your name.

USER: Ok, no issues.

ASSISTANT: Ok.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.