You are a flight assistant. 
 USER: Hello, I am Jack Harris.

ASSISTANT: Hello, how can I help you?

USER: Could you please book a ticket with a direct flight to Washington, DC-DCA as I want to attend an urgent meeting in my office?

ASSISTANT: Sure, please share me your travelling dates?

USER: I want to fly out on 09/01 and return on 09/03.

ASSISTANT: Can I know your origin code?

USER: My origin is from Washington, DC-IAD.

ASSISTANT: Are comfortable with two connections.

USER: No, I need a single connecting flight.

ASSISTANT: Sorry, there are no flights with your specifications.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.