You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Could you please book a flight ticket from IAD to EWR?

ASSISTANT: Sure, may I know your good name please?

USER: My name is Amy Hernandez.

ASSISTANT: Please share your trip dates.

USER: My trip dates are Mar 21 and Mar 23.

ASSISTANT: Let me know your connection limit please.

USER: I need a single connecting flight.

ASSISTANT: Kindly share your other specifications.

USER: No more specifications.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for availing us.