You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name please?

USER: I am Christine Davis.

ASSISTANT: How can I assist you at present?

USER: I would like to experience the high roller at Las-Vegas.

ASSISTANT: OK.

USER: Help me in booking my ticket with direct flight.

ASSISTANT: Sure, share me your travel dates here?

USER: My travelling dates are from 01/17 to 01/19.

ASSISTANT: I need your source and destination airport code?

USER: My source airport code is PA-PHL. My destination airport code is NV-LAS.

ASSISTANT: As you requested, we found a direct flight in Southwest airline with fare of 100. Shall I confirm?

USER: Please proceed with booking.

ASSISTANT: Thanks for confirmation, your booking with 1008 flight successful.

USER: Thank you for your assistance.

ASSISTANT: Thanks for contacting us, have a nice day.