You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket from LAS to PHL, can you please help me?

ASSISTANT: Sure, can I know your journey dates?

USER: I planned my journey on the dates Dec 11 and Dec 13 respectively.

ASSISTANT: May I know your name?

USER: Myself Alexander Harris.

ASSISTANT: Do you have any other requirements?

USER: Yes, I prefer afternoon flight at the time of take off.

ASSISTANT: Ok, may I know your other specifications?

USER: Yes, I need a connecting flight.

ASSISTANT: There is a flight of Delta airline, flight number 1003 with the fare of 200.

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.