You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel from DTW to IAD. Can you please help me in ticket booking?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are from 08/12 to 08/14.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Catherine Hernandez.

ASSISTANT: Do you have any connection limit?

USER: I have some urgent work so, I need a direct flight for this.

ASSISTANT: Do you have any other specifications?

USER: I would like to book my ticket in economy class.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.