You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Welcome to flight ticket booking agency. How may I assist you today?

USER: Thanks. I want to travel Washington, for attending a summit, so can you please book a flight ticket from Austin on 04/19?

ASSISTANT: Sure, I will help you on that.

USER: Thanks.

ASSISTANT: Could you please provide your nearest airport codes for booking?

USER: I want to take off from AUS airport and destination airport is DCA.

ASSISTANT: Ok, may I know your arrival date to proceed further?

USER: Please book my return ticket also on 04/21.

ASSISTANT: May I know your name please?

USER: Sure, my name is Patricia Campbell.

ASSISTANT: Ok Patricia, please wait a moment to check the flights availability.

USER: Ok.

ASSISTANT: Based on your information, flight number 1021 from Hawaiian airlines with 1 connection with the fare of 100 is available for you. Would you like me to proceed with this?

USER: Please proceed.

ASSISTANT: Ok, your reservation is done successfully.

USER: Thank you for your help in booking flight ticket.

ASSISTANT: Thank you for reaching us, have a great journey.

USER: Welcome.