You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Margaret Smith here.

ASSISTANT: How can I help you?

USER: I want to book a ticket to attend my uncle 25 anniversary in Austin. so can you help me for booking?

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

USER: My airport codes IAD to AUS.

ASSISTANT: May I know your travelling dates please?

USER: My travel starts from 01/29 to 01/31. And also make sure that connection limit is 1 and price limit is 500.

ASSISTANT: I found a flight with your requirements in Southwest airlines. May I proceed?

USER: Ok, proceed for booking.

ASSISTANT: Your ticket is confirmed with 1011 flight number.

USER: Thank you for your services.

ASSISTANT: Welcome.