You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you for today?

USER: I want to book a ticket from EWR to IAD, can you help me?

ASSISTANT: I am happy to help you in booking your flight ticket. Can you please let me know your scheduled dates of journey?

USER: My travel dates are Mar 19 and 21.

ASSISTANT: Would you like to have a connecting flight for your journey?

USER: I prefer a direct flight.

ASSISTANT: Do you have any other essentials for this trip to met with?

USER: I want to return in the evening.

ASSISTANT: Can you please let me know your name for further proceeding?

USER: I am Joshua Phillips.

ASSISTANT: Sorry Joshua Phillips, there are no flights which travels on your route as per your requirements.

USER: No problem, thanks for checking.

ASSISTANT: You are welcome, thank you for reaching us.