You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How may I assist you?

USER: Could you please help me in booking a flight ticket to Washington, DC-DCA as I want to attend a meeting in my head office?

ASSISTANT: Sure, do you have any price limit?

USER: I can afford upto 200 for a ticket.

ASSISTANT: Help me with the source code?

USER: My source is from Chicago, IL-ORD.

ASSISTANT: What are your planned trip dates?

USER: My planned trip dates are 04/11 and 04/13.

ASSISTANT: May I know your name for the booking purpose?

USER: My name is Brandon Davis.

ASSISTANT: Thank you for the details, we found that no flights were running to your locations.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us. Have a nice day.