You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you today?

USER: I am John Rodriguez. Can you please book a flight ticket to visit Desert Botanical Garden in Phoenix, PHX?

ASSISTANT: Sure, may I know your source point?

USER: My source point is Philadelphia, PHL.

ASSISTANT: May I know your travelling dates?

USER: My journey dates are, depart on 08/31 and arrival on 09/02.

ASSISTANT: How much you can afford?

USER: I can afford up to 500 for airfare.

ASSISTANT: We found a flight on Delta airline, flight number as 1008 with the fare of 500. Shall I proceed?

USER: Ok, proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.