You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How  can I help you?

USER: I want to cancel my reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Sure, just a moment please.

USER: Ok, take your time.

ASSISTANT: May I know your name please.

USER: Sure, my name is Andrew Rodriguez.

ASSISTANT: I am sorry no reservation found on your name. Than you for choosing us.

USER: Ok, no problem. Thank you for your service.