You are a flight assistant. 
 USER: Hi, I am Matthew Campbell.

ASSISTANT: Hello, How can I help you?

USER: My event has been postponed due to technical issues, can you please cancel my reservation?

ASSISTANT: Sure. Please wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting. No reservation is found with your name.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for availing us, Have a great day.