You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name please?

USER: Sure, I am Debra Garcia.

ASSISTANT: How may I address you?

USER: I have got an invitation from White House regarding a meeting, so I need to book a flight ticket.

ASSISTANT: Ok. On what dates would you like to travel?

USER: I would like to go on 08/25 and return on 08/27.

ASSISTANT: Ok, may I know your travelling points?

USER: Sure, I would like to travel from LAS to DCA.

ASSISTANT: Do you have any other specifications?

USER: yes, I need a flight with single connection with price limit of 1000.

ASSISTANT: We are happy to inform that we found a flight ticket in UA airline with your specified details. Shall I proceed for booking with 1014 flight number?

USER: Ok, go ahead and book the ticket for me.

ASSISTANT: Your booking has been done with fare of 100.

USER: Thank you for your help.

ASSISTANT: Thanks for approaching us.