You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I want to attend as a chief guest for Astrakhan's Colorado whiskey tour in Denver, DEN. Can you help me to book a connecting flight?

ASSISTANT: Sure, we are here to help you with that. Can you please provide your planned travel dates?

USER: My planned journey dates are June 14 and 16.

ASSISTANT: May I know your name please?

USER: This is Timothy Johnson.

ASSISTANT: Could you please share your source code to proceed further?

USER: I want to take off from Chicago, ORD.

ASSISTANT: Do you have any class preference?

USER: Yes, I want to travel in business class.

ASSISTANT: Is there any other requirements for your journey?

USER: No.

ASSISTANT: Sorry to say that, there is no flight available on this route as per your travel dates.

USER: Ok, not an issue. Thank you for helping me.

ASSISTANT: Most welcome, thank you for reaching us.