You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I need to cancel my reservation, can you please help me out?

ASSISTANT: Sure, Let me check your reservation details in our database.

USER: I am Timothy Moore.

ASSISTANT: Ok. please wait for a while.

USER: Ok.

ASSISTANT: Sorry, we couldn't found any reservation by your name in our database.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.