You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: Samantha Phillips here.

ASSISTANT: How can I help you?

USER: I want to book a flight ticket to Las Vegas to meet my childhood friend. Can you aid me for booking from Philadelphia, PA - PHL?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are 04/02 to 04/04.

ASSISTANT: Please provide your destination airport code?

USER: Sure, it is NV - LAS.

ASSISTANT: Do you need halt in between your journey?

USER: I need a halt.

ASSISTANT: Ok. No flights found with your requirement.

USER: Ok, thanks for your information.

ASSISTANT: Thank you.