You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I would like to meet my uncle at Washington-DC, can you please help me to book my flight ticket from SEA to IAD?

ASSISTANT: Sure, I am glad to help you out. Please send me your trip dates.

USER: Sure, I will depart on 11/13 and return on 11/15.

ASSISTANT: May I know your name to proceed further?

USER: My name is Michelle Campbell.

ASSISTANT: Here is a flight with 1 stop and price is 100 in UA airlines. Can I proceed with it?

USER: No, I prefer for a direct flight.

ASSISTANT: Sorry  Michelle Campbell, there is no flight in your route with your desired dates.

USER: No problem, anyway thank you for checking.

ASSISTANT: Thank you for reaching us.