You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you now?

USER: I am Patricia Perez. The WDC is the most popular car cruise on earth attended by about one million people annually at Washington, IAD. I need your help to book a ticket in a direct flight.

ASSISTANT: Sure, I am glad to help you with booking.

USER: Thank you.

ASSISTANT: May I know from which airport you are starting your journey?

USER: I would like to start from PHL, which is nearer to my place.

ASSISTANT: Please mention on which dates your are planning to travel?

USER: 11/25 - 11/27 are my travelling dates.

ASSISTANT: Do you like to travel on connecting flight?

USER: No, I need a direct flight as I mentioned already.

ASSISTANT: Please share me your price limit for ticket?

USER: 5000 is my price limit.

ASSISTANT: Thank you for the details, please wait for a moment while I check for the flight.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your journey data.

USER: Fine, I will go with another option. Thank you for your helping hand.

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