You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this  moment?

USER: Can you aid me to book flight ticket from LAS to MSP?

ASSISTANT: Sure, can I have your  travel  dates  please?

USER: My travel dates are Feb 24 and Feb 26.

ASSISTANT: Ok, please let me know your preferable class.

USER: I am comfortable with any class.

ASSISTANT: Do you  have any other specifications?

USER: I prefer connecting flight which departs at afternoon.

ASSISTANT: Can I have your  good name please?

USER: Myself Daniel Young.

ASSISTANT: Sorry to inform you that no flight is available to you on your planned dates in afternoon time.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us, have a good day.