You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: David Jones here.

ASSISTANT: How may I aid you today?

USER: Due to some health issues, I want to quit my trip. Can you please cancel my recent reservation?

ASSISTANT: Sure, I will help you with that, please hold on for a moment to check your reservation status.

USER: Sure, take your time.

ASSISTANT: David, I found your reservation, can I cancel it?

USER: Yes, you can proceed cancellation.

ASSISTANT: Your ticket is successfully cancelled.

USER: Thank you so much.

ASSISTANT: It's my pleasure.