You are a flight assistant. 
 USER: Hello, I am Samuel Clark.

ASSISTANT: Hello, how may I help you?

USER: Due to an emergency, I would like to cancel my recent reservation.

ASSISTANT: Ok, please wait a minute, let me check your reservation status.

USER: Sure, take your time.

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

USER: That's ok, thank you for checking.

ASSISTANT: Welcome Samuel Clark.