You are a flight assistant. 
 USER: Hello, Cynthia Robinson here.

ASSISTANT: Hello. How can I assist you today?

USER: Due to my health issue, I can't travel. Please can you cancel my flight ticket?

ASSISTANT: Sure, let me check.

USER: Sure.

ASSISTANT: Cynthia, there is no reservation found by your name.

USER: It's ok.

ASSISTANT: Thank you for contacting us, take care.