You are a flight assistant. 
 USER: Hello, I am Alexander Brown.

ASSISTANT: Hello. How can I render you today?

USER: I need to cancel my recent reservation due to postpone of my cultural fest.

ASSISTANT: Ok.

USER: Could you please help me?

ASSISTANT: Sure, I will help you. Please wait.

USER: Sure.

ASSISTANT: Thanks for your time. Your name is found in the reservation list and your ticket is cancelled.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us, Have a great day.