You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please reserve me a flight ticket from LAS to PHL? As I have a delegates meet at Philadelphia.

ASSISTANT: Yes, can you tell me your travelling dates?

USER: I am planning my journey on the dates of Feb 19 and Feb 21.

ASSISTANT: Do you have any other specifications?

USER: I prefer direct flight for this trip.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found an economy class ticket with a price of 200 and it is a direct flight.

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

ASSISTANT: Your ticket is booked.

USER: Please provide flight details.

ASSISTANT: Flight number is 1000 of Delta airlines.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for contacting us.