You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Davis.

ASSISTANT: How may I assist you?

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

ASSISTANT: Yes, I can help you. Can you tell me your dates of travel?

USER: I am departing on Feb 15 and return on Feb 17.

ASSISTANT: Do you have any other specifications?

USER: I want a flight with connection limit 0.

ASSISTANT: Give me a moment.

USER: I want to return in afternoon time.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

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

ASSISTANT: Thank you for contacting us.