You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my recent reservation due to sudden change in my trip.

ASSISTANT: Sure, may I know your name?

USER: I am Alexander Evans.

ASSISTANT: We are happy to inform you that there is reservation found on your name. Shall I proceed to cancel?

USER: Sure, you can proceed for cancellation.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you for your response.

ASSISTANT: Thank you.