You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I need a direct flight to travel from Las Vegas, NV - LAS to Denver, CO - DEN. Can you aid me in booking a flight ticket?

ASSISTANT: Sure, can I have your name please?

USER: I am Brian Baker.

ASSISTANT: Ok, let me know your travelling dates?

USER: I will fly on 08/26 and recur on 08/28.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flight reservation found with your details.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.