You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Alexander Miller here.

ASSISTANT: What type of help you are seeking from me?

USER: I want to attend a seminar in Washington.Can you please help me for booking a ticket?

ASSISTANT: Sure, can I get your planning dates?

USER: My departure date is 08/07 and return date is 08/09.

ASSISTANT: Ok, please provide your travelling location airport codes?

USER: My airport codes are from MI-DTW to DC-IAD. Make sure my connections limit is 1. My price limit is 500.

ASSISTANT: Just please wait for a moment, I will check for the flights.

USER: Ok.

ASSISTANT: There is a flight 1021 with a ticket budget of 200, is it suitable for you?

USER: Please proceed for booking.

ASSISTANT: Your ticket is confirmed with your name, you will get the travelling details from Southwest airways. Have a happy journey.

USER: Thank you for helping me.

ASSISTANT: You are welcome.