You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Betty Green.

ASSISTANT: Ok.

USER: On my father's birthday, I want to surprise him by arranging a small party at Phoenix, PHX. Can you help me in booking a ticket?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are 06/21 - 06/23.

ASSISTANT: Where would you like to start from?

USER: Los Angeles, LAX is my origin.

ASSISTANT: Do you need any stop over?

USER: Yes, I need a stopover in between my journey.

ASSISTANT: We found a Delta airline, flight number:1013 and the price is 200.

USER: You can proceed with booking.

ASSISTANT: Your booking has been done.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us.