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

ASSISTANT: Hello, how may I serve you?

USER: On my holiday vacation, I am planning to go for wine tasting tour at Seattle, SEA. Can you avail me a flight ticket with fare 1000?

ASSISTANT: Sure, I can help you. May I know your itinerary dates?

USER: I will start my journey on 01/04 and return on 01/06.

ASSISTANT: Do you need a halt in between your journey?

USER: I need a stopover in between my journey.

ASSISTANT: Help me with your source code.

USER: My take off airport code is Washington, DCA.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience, there were no flights found on your given specified dates.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for availing us.