You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Please help me to book a flight ticket from EWR to IAD.

ASSISTANT: Sure, may I know your dates of travel?

USER: My trip dates are from Aug, 02 to Aug, 04.

ASSISTANT: Do you have any specifications?

USER: I need an economy class to fly and I need a single connecting flight.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: May I know your name please?

USER: My name is Christine Edwards.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for opting us.