You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Carol Brown. I planned to meet my cousin in ORD, can you please help me to book a flight ticket from IAD?

ASSISTANT: Sure, can you share your journey dates?

USER: I prefer to travel on Jan 25 and Jan 27.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.