You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Gregory Wright want to visit a South mountain park in Phoenix, can you book a plane ticket within the fare of 1000?

ASSISTANT: Sure, may I know your airport codes?

USER: The airport codes are EWR and PHX.

ASSISTANT: To book a ticket I need your travelling dates.

USER: My travelling dates are 10/21 and 10/23.

ASSISTANT: There is a flight with airline:Spirit and flight number:1007 and price 100. Shall I proceed?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you have a nice day.