You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Ronald Adams here.

ASSISTANT: How can I assist you today?

USER: I am looking for a normal-cost airline for my business trip to Philadelphia. So can you book it?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Yes, my travel dates for the trip are from Sept 14 to Sept 16.

ASSISTANT: Please provide your airport codes that you want to travel.

USER: My airport codes are from SFO to PHL.

ASSISTANT: Do you have any specifications?

USER: I am looking for a economy class.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight with price 100 and the connections 0 is available. Shall I confirm your ticket?

USER: I am fine with the airlines and fare. You can book it.

ASSISTANT: Your ticket is booked. The flight number is 1025 and the airline is UA.

USER: Thank you.

ASSISTANT: Welcome, have a great day.