You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Due to inconvenience of my work, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, please help me with your name to check.

USER: My name is Dorothy Walker.

ASSISTANT: Thank you very much. Please wait for a while, let me check your reservation status in our database.

USER: Ok, I will wait.

ASSISTANT: I am very sorry to inform you that there is no reservation found under your name in our database.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.