You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to visit Phoenix to attend a meeting with client on 07/06.

ASSISTANT: Ok.

USER: Please help me with booking flight ticket.

ASSISTANT: Sure, can you help me with your airport codes?

USER: I will fly from Houston, TX-HOU and land on AZ-PHX.

ASSISTANT: Do you want a return ticket?

USER: Yes, I want my return ticket on 07/08.

ASSISTANT: Do you have any other requirements?

USER: Yes, I want a direct flight. Flight ticket price should not cross 1000.

ASSISTANT: Sure, I have found a flight -1028 of Frontier airlines, shall I proceed?

USER: Sure.

ASSISTANT: May I know your name?

USER: Anthony Brown.

ASSISTANT: Your ticket has been booked, have a nice journey.

USER: Thank you for helping me.

ASSISTANT: Welcome.