You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to cancel my ticket which is made on name of Robert Nelson as my plan to visit my friend to celebrate his birthday is cancelled. Can you help me with that?

ASSISTANT: Sure, we are glad to serve you. Please hold a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, sorry, no reservation found with your name.

USER: Thank you for the details.

ASSISTANT: Thank you for reaching us.