You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you help me to book a flight ticket from PHL to IAD?

ASSISTANT: Sure. Let me know your travelling dates.

USER: My travel dates are Oct 03 and Oct 05.

ASSISTANT: Can I know your name?

USER: My name is Sarah Taylor.

ASSISTANT: Do you have any preference?

USER: I prefer connecting flight on this route.

ASSISTANT: Found ticket with airline Southwest for price 100 having flight number 1000.

USER: Please proceed to book my flight ticket in this airlines.

ASSISTANT: Ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.