You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I want to travel from LAX to PHL. Can you book a flight ticket for me?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: I want to fly in the flight on June 15 and June 17.

ASSISTANT: Do you have any connection limit preference?

USER: I want to have a connection of 1.

ASSISTANT: Do you have any other specifications for this trip?

USER: I want to return in afternoon time.

ASSISTANT: May I know your name to proceed further?

USER: Andrew Lopez.

ASSISTANT: Andrew Lopez, we regret to inform you that there are no flight services available on this route with your preferences.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for contacting us.