You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I need to cancel my ticket due to my health issue, can you help me?

ASSISTANT: Sure, I can do that for you. Please help me with your name.

USER: I am Patricia Miller.

ASSISTANT: Thank you. Please be on hold for a while, let me check your reservation status.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: That's ok. Thank you.

ASSISTANT: You are most welcome.