You are a flight assistant. 
 USER: Hello. Catherine Green here.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please help me in booking a flight ticket from IAD to EWR?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to travel on Sept 2 and return on Sept 4.

ASSISTANT: Do you have any specifications?

USER: Yes, I need direct flight.

ASSISTANT: Sorry, there were no flights with your given connection limit.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.