You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight from PHL to LAX, can you help me out?

ASSISTANT: Sure, can you share your journey dates?

USER: My trip dates are from Mar 26th till Mar 28th.

ASSISTANT: Do you have any preferences?

USER: I would like to start my journey in evening session only.

ASSISTANT: May I know your name?

USER: Myself Cynthia Roberts.

ASSISTANT: There is a connecting flight with number 1000 in airline Spirit, the fare is 100 in business class. Can I book it?

USER: Please proceed with it.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.