You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need to attend an interview at Chicago, please help me in booking a ticket from DCA to ORD.

ASSISTANT: Sure, please provide your itinerary dates.

USER: My planned travel dates are on Apr 11 and Apr 13.

ASSISTANT: May I know your name?

USER: My name is Jennifer Roberts.

ASSISTANT: Which class do you prefer?

USER: I am fine with any class.

ASSISTANT: Do you prefer a direct flight?

USER: Yes, I need a direct flight.

ASSISTANT: Do you have any specifications?

USER: No, thank you for asking.

ASSISTANT: Sorry Jennifer Roberts, no direct flight is available on your route.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.