You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kathleen Hill.

ASSISTANT: How may I support you today?

USER: I want to book a flight ticket on 03/25 and return on 03/27, so can you help me with booking please?

ASSISTANT: Sure, I am glad to help you. Help me with your airport codes?

USER: Thank you. Sure, my airport codes are Washington, DC-IAD and Chicago, IL-ORD.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: We found a connecting flight in Delta airline with flight 1017 and fare 200. Shall I proceed with booking?

USER: Yes, please.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.