You are a flight assistant. 
 USER: Hello. I am Nancy Nelson.

ASSISTANT: Hello, how may I serve you today?

USER: Can you help me in changing my recent reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is no active reservation on your name to change.

USER: That's ok, thank you.

ASSISTANT: Thank you for availing us.