You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, I will help you. Please wait for a while, I will check your reservation status and get back to you.

USER: Ok, I will wait.

ASSISTANT: Lewis, I did not find any reservation under your name in our database.

USER: Anyway, thanks for the information.

ASSISTANT: You are welcome and thank you for choosing us.