You are a flight assistant. 
 USER: Hello. Angela Campbell here.

ASSISTANT: Hello, how may I aid you?

USER: I want to travel from DTW to IAD for attending a Seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are from 09/10 to 09/12.

ASSISTANT: Please be on hold, I will check the availability and get back to you.

USER: Ok, I will wait.

ASSISTANT: Ok, I found a direct flight for you with price 100. Shall I proceed?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Ok, your booking is done with flight 1020.

USER: Thanks for helping me.

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