You are a flight assistant. 
 USER: Hi, I am Katherine Collins.

ASSISTANT: Hello. How can I aid you Katherine Collins?

USER: I want to book a ticket to Denver to watch Cricket match on live. Please help me with booking.

ASSISTANT: Sure, I can help you with that. Please provide your complete journey details?

USER: I would like to start from Las Vegas, NV - LAS on 02/11 and return on 02/13. I need one connection.

ASSISTANT: OK, please wait for a while. I will check and revert you.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to say that no flights found on that criteria. Thanks for contacting us, have a nice day.

USER: No problem. Thanks for your service.