You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Please book a flight ticket from ORD to SEA.

ASSISTANT: Your travelling dates please?

USER: I want to travel in July from 4th to 6th.

ASSISTANT: Do you have any connection limit?

USER: I prefer to travel on a direct flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Joseph Carter.

ASSISTANT: I am sorry no flights found in your route.

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

ASSISTANT: Thank you for choosing us.