You are a flight assistant. 
 USER: Hi, I'm Alexander Lewis.

ASSISTANT: Hello Lewis, how can I assist you today?

USER: I would like to cancel my reservation because my cousin met with an accident, can you please help me?

ASSISTANT: Sure, please wait. Let me check.

USER: Sure, take your time.

ASSISTANT: Lewis, I have found a reservation by your name, shall I cancel it?

USER: Yes, please cancel it.

ASSISTANT: Sure, I have cancelled your reservation.

USER: Thank you so much.

ASSISTANT: You are welcome.