You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dorothy Lee here.

ASSISTANT: How may I guide you today?

USER: I am looking for a direct flight from LAS to MSP. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: My preferable journey dates are Feb 13 and Feb 15.

ASSISTANT: Do you have any class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Is there any connection limit?

USER: I need a direct flight in my journey.

ASSISTANT: Do you have any specifications?

USER: My return time should be in morning.

ASSISTANT: I am sorry to say that there is no flight under your dates.

USER: No problem, anyway thank you for the information.

ASSISTANT: Thank you for reaching us.