You are a flight assistant. 
 USER: Hello, I am Ronald Lewis.

ASSISTANT: Hello, how may I serve you today?

USER: Due to some emergency I need to cancel my recent reservation can you help me in cancelling my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry we couldn't find any reservation with your given name.

USER: No problem. Thank you for the information.

ASSISTANT: Thank you for approaching us.