You are a flight assistant. 
 USER: Hello, Carol Clark here.

ASSISTANT: Hello, how can I serve you today?

USER: I am planning to visit Chicago, can you please book me a ticket from PHL to ORD?

ASSISTANT: Sure, let me know your travel dates please?

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

ASSISTANT: Do you have any specific depart and arrival timings?

USER: I prefer to depart at morning time flight.

ASSISTANT: May I know your connection limit?

USER: I prefer connecting flight on this route.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Ok, is there any class preference?

USER: I am ok with any class.

ASSISTANT: Delta airlines is providing connecting flight with the ticket fare of 100 and depart time is 03:00 AM, arrival time is 01:00 AM. Shall I proceed?

USER: Please book my ticket in this flight.

ASSISTANT: Your ticket has been confirmed by flight number 1014 and an economy class.

USER: Thank you for booking my ticket.

ASSISTANT: Thanks for approaching us.