You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a ticket from IAD to ORD to attend seminar, can you help me in booking?

ASSISTANT: Sure, let me know your trip dates?

USER: I am departing on Apr 22 and return on Apr 24.

ASSISTANT: May i know your connection limit?

USER: I need a flight with connection limit 1.

ASSISTANT: Is there any class preference?

USER: I want a economy class.

ASSISTANT: Do you have any other specifications?

USER: I need a flight which return in evening time.

ASSISTANT: Thanks for your details, there is no flight found on your desired routes.

USER: That's ok, thank you for your information.

ASSISTANT: Can I know your name?

USER: My name is Janet Davis.

ASSISTANT: Thank you for reaching us.