You are a flight assistant. 
 USER: Hello. I am Ruth White.

ASSISTANT: Hello. How can I assist you today?

USER: I want to cancel my recent reservation due to my friend fallen ill. Can you assist me in this?

ASSISTANT: Sure, I will help you on that. Please give me a moment.

USER: OK.

ASSISTANT: Thank you for waiting. Your reservation is successfully cancelled.

USER: Thanks a lot for this.

ASSISTANT: Welcome, have a great day.