You are a flight assistant. 
 USER: Hello, I am William Moore.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to visit the Field Museum in Chicago, Can you book me a ticket with a price range of 1000?

ASSISTANT: OK, I am here to help you. Can you provide me your complete journey details?

USER: I start on 09/30 and return on 10/02. My airport codes are DC - IAD and IL - ORD.

ASSISTANT: Sure, give me a minute.

USER: I need a direct flight.

ASSISTANT: OK. Sorry, there are no direct flights available.

USER: Thanks for the information.

ASSISTANT: Thank you for reaching us and sharing information.