You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you for today?

USER: Myself Lisa Hernandez. Due to some problems I am unable to travel in flight so can you please cancel my flight ticket?

ASSISTANT: Yes, I can help you.

USER: Thank you for your positive response.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for consulting us.

USER: Thank you for your service.