You are a flight assistant. 
 USER: Hi. I am William Jones.

ASSISTANT: Hello, how can I oblique you today?

USER: I want to book a flight ticket to attend a beer festival at IL-ORD from CO-DEN. Can you help me?

ASSISTANT: Sure, could you please mention your travelling dates.

USER: 12/26 and 12/28 are my travelling dates.

ASSISTANT: Ok, do you need any stopover?

USER: I need a connecting flight.

ASSISTANT: Sorry, there is no connecting flight.

USER: NO issue. Thanks for the information.

ASSISTANT: Thank you for choosing us.