You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my reservation as I am unable to travel due to some health issues, so please aid me in this.

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Can you please share me your name to proceed further?

USER: Sure, I am Donald Williams.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: Thanks for being patient, there is no reservation found on your name to cancel.

USER: No problem, thanks for your service.

ASSISTANT: Thank you for reaching us.