You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: Myself Steven Hernandez.

ASSISTANT: I hope you are fine.

USER: I would like to visit Philadelphia to meet my friend, can you please help me in booking?

ASSISTANT: Sure, I will help you with that. May I know the preferable dates of your journey?

USER: I will start my journey on 03/18 and my return will be on 03/20.

ASSISTANT: Kindly, can you please mention the airport codes of your journey?

USER: My airport codes are from ORD to PHL.

ASSISTANT: Ok, please wait for a moment.

USER: Please search a direct flight for me.

ASSISTANT: Sorry, there is no flight with 0 connection limit.

USER: It's ok. Thank you for checking.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Welcome.