You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

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

ASSISTANT: Sure, I can help you. May I know your name?

USER: Thank you. Sure, my name is Benjamin King.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for being waiting, We didn't found any reservation by this name.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for picking us.