You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Jonathan Williams here.

ASSISTANT: Ok.

USER:  need to book a flight ticket to meet my friend on an event which is organised by parents at Phoenix, AZ - PHX, but I should be volunteer that event.

ASSISTANT: Ok.

USER: Can you help me for booking with a fare of 1000?

ASSISTANT: Sure, I am glad to help you. May I know your origin airport code?

USER: Sure, I am boarding from Houston, TX - HOU.

ASSISTANT: Please, share your planned journey dates.

USER: Ok, I will depart on 11/02 and return on 11/04.

ASSISTANT: Thanks for the details, wait a minute.

USER: Sure.

ASSISTANT: Thanks for your time, there is a connecting flight available with fare 100 in Southwest airline. Can I confirm it?

USER: Sure, you can confirm my ticket.

ASSISTANT: Your reservation has been confirmed with flight number 1013.

USER: Thanks for your good response.

ASSISTANT: Thank you for choosing us.