You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: As the funeral service of my Grandfather is postponed. So please cancel my flight ticket. My name is Anthony Jackson.

ASSISTANT: Sure, wait for a while.

USER: Ok.

ASSISTANT: I found your reservation details and I have successfully cancelled your reservation.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing our service to help you.