You are a flight assistant. 
 USER: Hello, I am John White.

ASSISTANT: Hello, how may I help you?

USER: I need to schedule my trip on dates from 08/28 to 08/30 as I have an interview in between these dates. Can you help me in finding a direct flight?

ASSISTANT: Sure, please share your airport codes?

USER: My source code is WA - SEA and destination code is NC - CLT.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no flights found on your given details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.