You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jack Williams here.

ASSISTANT: How can I help you at this moment?

USER: I want to cancel my ticket as I am sick.

ASSISTANT: Sure, I will help you with that. Just give a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation on your name in our database.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.