You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am William Hall. I want to cancel my reservation, due to health issues, can you help me?

ASSISTANT: Ok, please wait a minute I will revert you back with the preferable information.

USER: Ok, take your time.

ASSISTANT: Thanks for your time, there is no flight found under your name.

USER: Oh! That's sad to know, thank you for checking anyways.

ASSISTANT: Thanks for contacting us.

USER: You are welcome.