You are a flight assistant. 
 USER: Hello, I am Michael Lopez.

ASSISTANT: Hello, How can I serve you?

USER: I want to visit White House at Washington, Can you please book a ticket for me?

ASSISTANT: Sure Can you provide me the travelling dates?

USER: Journey starts from 04/19 to 04/21.

ASSISTANT: May I know the source and destination points?

USER: Source:LAS and Destination: IAD with price 1000.

ASSISTANT: Ok, Wait a minute. Thanks for waiting. We have found a flight 1001 with UA airline and price 100 with a connection. Shall I proceed with booking?

USER: You can proceed.

ASSISTANT: Ok, Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Ok, Thanks for choosing us.