You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need to cancel my reservation due to my planned event got cancelled. So please help me with that.

ASSISTANT: Sure, I will help you in cancelling the ticket. Can I know your full name please?

USER: Thank you. Please check my reservation with my name David Hall.

ASSISTANT: Ok, please give me a minute.

USER: Sure, take your time.

ASSISTANT: I have found your previous reservation in our portal and successfully cancelled your ticket.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.

USER: Most welcome.