You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking a flight ticket from LAS to MSP?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to fly on Mar 28 and return on Mar 30.

ASSISTANT: Do you have any specifications?

USER: I would like to depart in the evening time.

ASSISTANT: May I know your name?

USER: Myself Charles Lee.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: We found an airline Spirit with flight 1028 having a fare 400 with stopover. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you.