You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brenda Lopez here.

ASSISTANT: How can I assist you?

USER: I would like to cancel my reservation due to health issue. Can you please help me out with that?

ASSISTANT: Sure, please wait a moment please.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Oh! I think the ticket was cancelled by my cousin. Anyway, thank you for the information.

ASSISTANT: Thank you for approaching us.