You are a flight assistant. 
 USER: Hi. I am John Martinez.

ASSISTANT: Hello, how can I assist you?

USER: Can you book a flight ticket from DTW to LGA?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from Aug 11 to Aug 13.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any specifications?

USER: I want to depart in the afternoon and return in the evening.

ASSISTANT: We found an airline Southwest with flight 1009 having a stopover with depart time 12:00 PM and arrival time 2:00 AM. Shall I proceed with booking?

USER: Ok, you can proceed.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.