You are a flight assistant. 
 USER: Hi, William Perez here.

ASSISTANT: Hello, how may I aid you?

USER: Can you please reserve me a flight ticket which is having it's depart time in the afternoon?

ASSISTANT: Sure, can you please share your airport codes?

USER: My airport codes are EWR - DFW.

ASSISTANT: May I know your travel dates?

USER: My trip dates are 12/28 - 12/30.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Which class do your prefer?

USER: I am ok with any class.

ASSISTANT: May I know your airline preference?

USER: No. I do not have any airline preference.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for reaching us.