You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Gregory Taylor.

ASSISTANT: How can I assist you today?

USER: I want to cancel my flight ticket. Can you please help me with that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Sorry to say this, there is no reservation found under your name in our database.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.