You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Can you please help me in cancellation of my ticket?

ASSISTANT: Sure, let me know your name to check further?

USER: Sure, myself Dennis Campbell.

ASSISTANT: Sorry, no reservation found on your given name.

USER: It's ok, thank you.

ASSISTANT: Thank you for contacting us.