You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Donna Rodriguez here.

ASSISTANT: How can I assist you?

USER: Due to high fever, I'm unable to travel. So, can you cancel my ticket?

ASSISTANT: Sure, give me a minute. Sorry Donna, I couldn't find any reservation on your name.

USER: It's ok. Anyways, thank you to inform me.

ASSISTANT: You are welcome.