You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: I am Anna Lee. I need a flight ticket to reach Washington city, can you please help me to search a flight from PHL to DCA?

ASSISTANT: Sure, I am here to help you with that. Can I have your travelling dates?

USER: Thank you. My planned travel dates are Aug-23 and Aug-25.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a flight which is departing in the afternoon time.

ASSISTANT: Do you have any other class specifications?

USER: I prefer to travel in an economy class flight.

ASSISTANT: Please wait for a minute.

USER: Ok, please make sure that the maximum connections in between my journey should be 1. It.

ASSISTANT: Sorry to say that, there are no flight's available based on your journey details.

USER: It's ok, not a problem with that.  Anyways thank you for your help.

ASSISTANT: Thank you for reaching us. Have a nice day.

USER: You are welcome.