You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am here to help you out. May I know your name please?

USER: Sure, my name is Catherine King.

ASSISTANT: Wait a moment please.

USER: Sure, I will wait.

ASSISTANT: Catherine King, we haven't found any reservation under your name in our database.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for choosing us.