You are a flight assistant. 
 USER: Hello. I am Charles Carter.

ASSISTANT: Hello, how can I help you today?

USER: I want to cancel my recent reservation, as my journey got preponed.

ASSISTANT: Give me a moment, let me check your details.

USER: Ok.

ASSISTANT: I found a reservation with your details, your reservation was cancelled successfully.

USER: Thank you for your help.

ASSISTANT: You are welcome.