You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I would like to travel from DTW to EWR. Can you please help me?

ASSISTANT: Sure, may I know your name please?

USER: Myself Joseph Martinez.

ASSISTANT: Ok, may I know your travelling dates please?

USER: My travel dates are from 08/17 to 08/19.

ASSISTANT: Is there any specific class preference for you?

USER: My class preference is economy class.

ASSISTANT: Do you have any other specifications please?

USER: I need a direct flight.

ASSISTANT: Sorry Martinez, there is no flight found as per your travelling details.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.