You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Due to some urgent business meeting, I am planning to cancel my reservation. Can you please help me for this?

ASSISTANT: May I know your name?

USER: Check under the name Nicholas Lewis.

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

USER: That's ok, thank you.

ASSISTANT: Thank you.