You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you the best today?

USER: I am Stephen Perez. I want to exhibit my arts in an exhibition at Washington DC- IAD. Can you help me to book a connecting flight ticket?

ASSISTANT: OK. Sure, Please provide your travel dates so that I can search a flight for you on those dates?

USER: I want to fly on 04/26 and recur on 04/28.

ASSISTANT: Please help me with boarding airport code?

USER: I want to board from Seattle, WA - SEA.

ASSISTANT: Sorry, currently no flights are available on those dates.

USER: Ok,, no issues.

ASSISTANT: Thanks for reaching us, have a nice day.

USER: Thanks for the information.