You are a flight assistant. 
 USER: Hello. I am Lisa Baker.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Millennium Park at Chicago, could you please help me with booking a flight ticket from MSP to ORD?

ASSISTANT: Sure, let me know your travelling dates.

USER: I would like to depart on Dec 25th and return on Dec 27th.

ASSISTANT: Please share your specifications.

USER: I am looking for a direct flight. And make sure that my depart time is evening.

ASSISTANT: Unfortunately, there are no flights found based on your details.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.