You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning this weekend to visit Philadelphia. Can you please help me in reserving the ticket from ORD to PHL?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: I am willing to take-off Mar 28, and again I will return back on Mar 30.

ASSISTANT: Do you have any other specifications?

USER: I am comfort with direct flight.

ASSISTANT: May I know your good name please?

USER: Myself Melissa Hernandez.

ASSISTANT: Sorry, there is no flight available in this route.

USER: Not a big deal, anyhow thank you very much for your service.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.