You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kathleen Anderson.

ASSISTANT: How may I help you?

USER: I want to attend a wedding in Phoenix. Can you book a ticket from DEN to PHX?

ASSISTANT: May I know your travel airport codes?

USER: I want to travel on 02/18 and 02/20.

ASSISTANT: There is a flight in AA airlines, can I proceed booking?

USER: Proceed to booking.

ASSISTANT: Your booking is done with flight number 1009.

USER: Thank you for your help.

ASSISTANT: Most welcome.