You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need you to book a flight ticket from PHL to SFO.

ASSISTANT: Yes, please can I know your dates of journey?

USER: January 23 and 25 are my planned travelling dates.

ASSISTANT: Ok, please let me know your specifications?

USER: I prefer to fly in a economy class.

ASSISTANT: Ok, please can I know your name?

USER: My name is Margaret Brown.

ASSISTANT: Ok, there is a flight ticket available for the airfare 100 and the connection limit is 1. Can I book the flight 1024?

USER: Great! Please book the ticket.

ASSISTANT: The flight ticket is booked and the airlines is Delta.

USER: Thank you very much.

ASSISTANT: Ok, thank you for choosing our agency.