You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you right now?

USER: I want to cancel my flight ticket due to some personal problems. Can you help me?

ASSISTANT: I understand your request and will be happy to help you.

USER: Thank you.

ASSISTANT: Could I have your name please?

USER: Yes, I am Linda Harris here.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to cancel further.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for consulting us. If any questions arise, please feel free to contact us at any time.

USER: You are welcome.