You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in reserving the ticket from EWR to DEN?

ASSISTANT: Sure, please share your itinerary dates.

USER: I am planning my trip on Jan 21 and again I will return back on Jan 23.

ASSISTANT: Do you prefer a direct or connecting flight?

USER: I am comfort to travel in single connection flight.

ASSISTANT: In which class do you prefer to travel?

USER: I don't have any particular class regarding my journey.

ASSISTANT: May I know your name?

USER: Myself Patrick Hernandez.

ASSISTANT: Please give me a moment to check for a best flight on you route.

USER: I am planning to depart in the afternoon. Can you please check for this?

ASSISTANT: Sure. Sorry Patrick Hernandez, no flights are available from New York in the afternoon.

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for reaching us.