You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Matthew Evans.

ASSISTANT: Nice to meet you Matthew Evans.

USER: I planned a small trip from Seattle, WA- SEA to Washington DC- IAD. Can you please help me in booking a flight ticket?

ASSISTANT: Sure Matthew. May I know your trip dates Matthew?

USER: Sure, my preferable travelling dates are from 08/07 to 08/09.

ASSISTANT: Please wait a moment,I will inform you.

USER: OK.

ASSISTANT: Sorry Matthew Evans,no flights available as per your requested dates.

USER: OK, thank you for providing the information.

ASSISTANT: Have a nice day Matthew Evans.