You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Assist me in cancelling my flight ticket. As I modified my journey dates.

ASSISTANT: Sure, I will help you with that.

USER: Thanks for accepting my request.

ASSISTANT: Let me know your name to check your reservation?

USER: Myself Jacob Lewis.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT:  Thanks for waiting, we found the reservation on your name, are you sure you want to cancel it?

USER: Sure, proceed to cancel it.

ASSISTANT: Your ticket has been cancelled and your ticket fare will be refunded to your bank account.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us.