You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I need to travel from IAD to EWR, can you help me with that?

ASSISTANT: Sure, I am glad to help you. May I know on what dates would you like to travel?

USER: My travel dates are 02/26 and 02/28.

ASSISTANT: May I know your name?

USER: I am William Thomas.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any specifications?

USER: Nothing.

ASSISTANT: Sorry, there are no direct flights available on your route.

USER: That's ok. Thank you for your service.

ASSISTANT: Thank you for choosing us.