You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to attend a Seminar in Philadelphia. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I can help you and can I know your desired travel dates?

USER: My travelling dates are Sep 26 and Sep 28.

ASSISTANT: Can I know your regional airport codes?

USER: My airport codes are PHX and PHL.

ASSISTANT: Please let me know if you need a connecting flight.

USER: I prefer single connecting flight.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I want to departure on evening.

ASSISTANT: Is there any airline preference?

USER: I prefer normal cost airline.

ASSISTANT: Can I know your name please?

USER: My name is Stephanie Thompson.

ASSISTANT: Sorry, there is no flight obtained on your travel dates to reserve a seat for your journey.

USER: Anyway, thanks for the information.

ASSISTANT: You are most welcome.