You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephen Jones.

ASSISTANT: What can I do for you?

USER: Due to bad weather, I would like to cancel my reservation. Will you help me?

ASSISTANT: Sure, I will help you in that.

USER: Ok.

ASSISTANT: Sorry Stephen, no reservation has been found on your name.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us, have a nice day.