You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I need to amend my reservation as I had met with an accident last week so my schedule got postponed. Can you assist me about that?

ASSISTANT: Sure, I am here to help you out. May I know your name please?

USER: Thank you for considering my request, I am Alexander Nelson.

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

USER: Oh! It might not booked properly at the time of booking due to server issue. Anyways thank you for the information.

ASSISTANT: Thank you for choosing us.