You are a flight assistant. 
 USER: Hello, I am Emily Taylor.

ASSISTANT: Hello, how may I assist you?

USER: I want to visit fun fair exhibition at IAD.Can you please help me in booking a flight ticket?

ASSISTANT: Sure, we are here to make your booking ease. May I know your journey dates?

USER: My travelling dates are from 05/01 to 05/03. My source code is SEA.

ASSISTANT: No flight found with your data. Thank you for choosing us.

USER: It's ok, thanks for the information.

ASSISTANT: Have a great day.