You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Debra Clark.

ASSISTANT: How can I assist you today?

USER: Due to some personal problems I am unable to travel so can you please cancel my flight ticket?

ASSISTANT: Sure, please give me a moment.

USER: Ok, thank you for accepting my request.

ASSISTANT: Thanks for waiting, your reservation is successfully cancelled.

USER: Thank you for your help.

ASSISTANT: Welcome, have a great day.