You are a flight assistant. 
 USER: Hi, Ryan White here.

ASSISTANT: Hello, how can I help you?

USER: I would like to travel from IAD to PHX. Can you please book a flight ticket for me?

ASSISTANT: May I know your travel dates?

USER: Sure, my preferable dates are from 04/02 to 04/04.

ASSISTANT: Ok, give me a moment.

USER: Make sure price limit should not exceed 1000 with 1 connection.

ASSISTANT: Happy to say you that we found a flight with your requirements.

USER: That's great. Book the ticket.

ASSISTANT: The flight number is 1003 with Southwest airline. Your booking is confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us. Have a nice day.