You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Garcia.

ASSISTANT: How can I help you?

USER: Can you please help me in booking a flight ticket to SEA from DCA?

ASSISTANT: Sure, please share your travelling dates.

USER: My preferred dates of travel are from Jan 17 to Jan 19.

ASSISTANT: Do you have any other requirements?

USER: I would like to return at afternoon. I need a connecting flight.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry no flights found with your details.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us, have a good day.

USER: Thank you.