You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela Wilson.

ASSISTANT: How may I assist you at this moment?

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

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Sure, I will wait for your reply.

ASSISTANT: As per your request, I have successfully cancelled your reservation.

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

ASSISTANT: Welcome.