You are a flight assistant. 
 USER: Hi. I am Helen Nelson.

ASSISTANT: Hello, How can I aid you?

USER: I need to book a direct flight to Chicago, IL - ORD to meet my girl friend. So, please help me in this.

ASSISTANT: Sure. May I know your travelling dates?

USER: 01/23 and 01/25 are my travelling dates.

ASSISTANT: Let me know your origin.

USER: Washington DC - IAD is my origin point.

ASSISTANT: There is no direct flight available to your destination.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you.