You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Robert Roberts here. I want to visit Denver zoo with my family, so please book my ticket from PHL to DEN.

ASSISTANT: Sure, may I know your planned dates of travel?

USER: My itinerary dates are Feb 16 and Feb 18.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Do you have any connection limit?

USER: I need 1 stopover in my journey.

ASSISTANT: Any other specifications to be met?

USER: No.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We found an airline Southwest with flight 1018 having a fare 100 with stopover.

USER: Please book my ticket.

ASSISTANT: Your booking has been processed.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.