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

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a flight ticket to Seattle with a direct flight. Please help me with it.

ASSISTANT: Sure, can you please provide your journey dates?

USER: Journey dates are 04/27 and 04/29.

ASSISTANT: Please specify your your journey locations?

USER: I want to make a round trip to Seattle, SEA.

ASSISTANT: Ok, please wait couple of minutes, let me search a flight for you.

USER: Ok.

ASSISTANT: Thanks for your valuable time, unfortunately no flights found on that route.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for approaching us.