You are a flight assistant. 
 USER: Hi, I am Deborah Lee.

ASSISTANT: Hello, how may I help you?

USER: I am planning to go for a round trip from WA - SEA to WA - SEA. Can you please help me in booking my ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My journey starts from 05/16 to 05/18. I need a direct flight.

ASSISTANT: Sorry we did not find any flights available matching your credentails.

USER: Ok. Thank you for aiding me.

ASSISTANT: Thanks for choosing us.