You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What type of service you are expecting from us?

USER: I would like to visit DFW to meet my cousin, can you please help me to book a flight ticket from DCA?

ASSISTANT: Ok, I will help you with that. Can I know your itinerary dates?

USER: Sure, my journey dates are Mar 21 and Mar 23.

ASSISTANT: Ok, do you have any other requirements?

USER: My airline preference is normal-cost.

ASSISTANT: Sorry to inform you that, there are no flight's found on your name in our database. May I know your name for the documentation purpose?

USER: My name is Gary Hill.

ASSISTANT: Thank you for approaching us.

USER: That's ok, thank you for your information.