You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Sharon Baker. I need amend my reservation, can you help me out please?

ASSISTANT: Sure, please hold on for a moment, let me check.

USER: Sure, take your own time.

ASSISTANT: I am sorry, there are no reservations with your name.

USER: That's ok, no problem Thank you for your response.

ASSISTANT: Thank you, have a good day.