You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you?

USER:  This is Patrick Jackson. Please book a ticket to reach San Francisco, SFO from Washington, IAD within 500?

ASSISTANT: Sure, may I know when are you planned to travel?

USER: I planned to travel on 11/19 and return on 11/21.

ASSISTANT: Do you want any halt in between your journey?

USER: Yes, Usually I prefer a connecting flight.

ASSISTANT: We found a flight on your details with airline Delta, flight number: 1026. Shall I reserve this ticket for you?

USER: Everything's Fine, proceed for booking.

ASSISTANT: Ok. Your ticket has been booked.

USER: Thanks for your assistance..

ASSISTANT: Thank you.