You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to cancel my reservation, can you help me with this?

ASSISTANT: Sure, Let me know your name to check your reservation?

USER: I am Benjamin Allen.

ASSISTANT: I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: Ok, fine. Thank you for checking.

ASSISTANT: Thank you for choosing us.