You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: As I got an opportunity to work as a chef at Charlotte, but as the joining date has been changed because of the busy schedule of the management, so can you help me in changing my existing reservation?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you so much for your response.

ASSISTANT: May I know your name please?

USER: Please find out the reservation with the name Michelle Martin.

ASSISTANT: Wait a moment please.

USER: Sure, take your own time.

ASSISTANT: Michelle Martin, we haven't found any reservation under your name in our database.

USER: No problem, I think it has been done in another agency.

ASSISTANT: Thank you for reaching us.

USER: Thank you so much for your effort.