You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Samantha Walker here.

ASSISTANT: How can I hand helping to you at this time?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, let me check with that one, wait for a while.

USER: Ok.

ASSISTANT: Thank you for your patience, as per your request there is no ticket reservation found for the user name which you have provided.

USER: Not a problem.

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

USER: Thank you.

ASSISTANT: Welcome.