You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to celebrate my birthday in Dallas, so please help me in booking a flight ticket from Washington.

ASSISTANT:  Sure, I would be happy to help you. Can you please provide your take off and landing airport codes?

USER: My airport codes are DC - IAD, TX - DFW.

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

USER: Yes, I need a halt.

ASSISTANT: May I know when you have planned to travel?

USER: I want to fly on 04/21 and return on 04/23.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: I am Jacob Wright.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT:  Unfortunately, We found a Southwest airline which is a direct flight, that does not matches your needs.

USER: Not an issue.

ASSISTANT: Ok, Thank you for reaching us.

USER: Thank you.