You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

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

ASSISTANT: Sure, we are glad to help you. Please help me with your travelling dates.

USER: My preferable journey dates are Dec 11 and Dec 13.

ASSISTANT: Do you have any break in between journey?

USER: I prefer direct flight for this trip.

ASSISTANT: May I know your class preference?

USER: I prefer economy class flight.

ASSISTANT: Is there any other specifications for you?

USER: No, thanks for asking.

ASSISTANT: On which name would you like me to book the flight?

USER: Please reserve the ticket with my name Robert Robinson.

ASSISTANT: Thanks for providing details, there is a direct flight found in Southwest airline with a fare of 200 which departs at 3:00 AM and return at 5:00 AM. Shall I proceed for booking?

USER: That's ok for me. Please reserve my ticket in this flight.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1024.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.