You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick White.

ASSISTANT: How can I assist you today?

USER: I am planning to cancel my recent reservation, due to health issue. Can you please cancel my ticket?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Sure, I will wait.

ASSISTANT: Patrick, there is no reservation found under your name.

USER: That's fine. Thank you for your help.

ASSISTANT: Thank you for contacting us, have a great day.