You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I need to modify my reservation as I have met with an accident last week. So, can you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thanks for your concern.

ASSISTANT: May I know your name?

USER: Sure, my name is Donald Turner.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: There is no reservation found under your name to change.

USER: Oh! It might not booked at the time of booking. Anyways thank you for the information.

ASSISTANT: Thank you for opting us.