You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to visit Seattle, WA-SEA in the month of April. Can you please help me to search a flight from Washington?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: The travelling dates are 04/22 to 04/24.

ASSISTANT: Ok, may I know your source code to proceed further?

USER: The source code is from DC-IAD.

ASSISTANT: Ok, please wait for moment.

USER: Sure.

ASSISTANT: May I know your price limit?

USER: My price is 200.

ASSISTANT: Sorry to say, no flights were available with your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us, have a nice day. May I know your name for documentation purpose?

USER: My name is Daniel Moore.

ASSISTANT: Thank you.

USER: Thank you.