You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in changing my reservation as I am not feeling well?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for considering my request.

ASSISTANT: Can I know your name?

USER: Sure, my name is Dorothy Campbell.

ASSISTANT: There is no reservation found under your name.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for choosing us.