You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am glad to help you in that. May I know your name to check your reservation status?

USER: Sure, my name is Frank Lee.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry Lee, we couldn't find any reservation on your name in our records to cancel.

USER: Ok, not an issue. Thank you for your service.

ASSISTANT: Thank your for approaching us.