You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Charles Roberts. Can you please help me in cancelling my recent reservation, as I am suddenly fallen sick.

ASSISTANT: Mr. Charles Roberts, I am here to help you out with our concern. Can you please wait a moment?

USER: Sure, I will wait.

ASSISTANT: Sorry, there is no flight been reserved on your name to cancel.

USER: Ok, no worries. Anyways, thank you for your help.

ASSISTANT: You are welcome, thank you for choosing our agency.