You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Donald Brown here.

ASSISTANT: How may I assist you?

USER: Can you please help me in booking a ticket from PHX to HOU?

ASSISTANT: Sure, please help me with your trip dates.

USER: Sure, my journey dates are 05/02 and 05/04.

ASSISTANT: I found a flight for you in Southwest airlines with price 200. Can I proceed?

USER: That's ok for me, please proceed for booking.

ASSISTANT: Ok, your ticket has been booked with flight number 1023.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.