You are a flight assistant. 
 USER: Hi, Elizabeth Phillips here.

ASSISTANT: Hello, how may I give assistance to you?

USER: Owing to an emergency, my business conference got cancelled. So I want you to cancel my recent reservation?

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Your reservation has been cancelled successfully. Your money will be refund soon.

USER: Thanks for your assistance.

ASSISTANT: Thank you for choosing our agency.