You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gregory Brown here.

ASSISTANT: How can I assist you, Brown?

USER: Could you book my ticket from PHX for a round trip? As I have my to attend my interview.

ASSISTANT: Sure, may I know your planned trip dates?

USER: My itinerary dates are 12/14 and 12/16.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: I found a flight in Southwest airlines with price 100. Shall I book the ticket for you?

USER: Please book my ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1001.

USER: Thank you.

ASSISTANT: Thank you for contacting us.