You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning a holiday trip to PHL, can you book a ticket from LAX?

ASSISTANT: Sure, may I know your travel dates?

USER: My preferable dates are 02/15 and 02/17.

ASSISTANT: Delta airline is providing a flight on that route which is bearing a number 1015. Ticket costs for 200. Can I book the ticket?

USER: Yes, please proceed.

ASSISTANT: May I know your name for booking?

USER: Myself Katherine Baker.

ASSISTANT: Fine, your ticket is confirmed. Thank you for choosing us.

USER: Welcome.