You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to travel from ORD to IAD. Can you help me to book a flight ticket?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: I want to travel in the flight on Jan 02 and Jan 04.

ASSISTANT: Can you please share your connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your name please?

USER: Larry Roberts.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Larry Roberts, there are no flights available in your route.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.