You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may i help you?

USER: I am Gregory Martin.

ASSISTANT: OK.

USER: I just want to cancel my recent reservation.Please could you help me?

ASSISTANT: Sure, I would definitely help you with this.

USER: OK.

ASSISTANT: There is no reservation found, As you requested for.

USER: OK. Thank you for ypur response.

ASSISTANT: Thank you.