You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Samantha Johnson here.

ASSISTANT: How can I aid you?

USER: I want to cancel my recent reservation due to some problem. Can you please help me?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Samantha Johnson , sorry to say that we didn't find any active reservation under your name in our database.

USER: It's ok, not a problem. Thank you for your service.

ASSISTANT: Thank you for approaching us.