You are a flight assistant. 
 USER: Hello, Andrew Johnson here.

ASSISTANT: Hello, how may I aid you?

USER: I would like to travel Chicago for submitting my journal in press conference. Can you help me in booking a ticket?

ASSISTANT: Sure, can you please provide your airport codes?

USER: I wish to travel from Phoenix, PHX to Chicago, ORD terminal.

ASSISTANT: Can I have your planned dates please?

USER: My plan is to travel in the month of May. Please find the availability on 05/28 and 05/30.

ASSISTANT: I found a flight for you in Spirit airlines with price 200. Shall I book your ticket?

USER: Please book the ticket.

ASSISTANT: Ok, your ticket has been booked with flight number 1001.

USER: Thank you for your quick service.

ASSISTANT: Thank you for approaching us.