You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I have to cancel my previous flight ticket booking due to health problems, can you please help me?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: Thank you for considering my request and my name is William Carter.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: William Carter, there is no reservation found under your name.

USER: No issues, thank you for checking my reservation status.

ASSISTANT: You are welcome. Thank you for contacting us.