You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I'm Justin Smith and I want to travel to Las-Vegas for my friend's birthday party.

ASSISTANT: Nice.

USER: My airport codes are DCA and LAS.

ASSISTANT: Could you please mention me your departure and arrival dates?

USER: My Trip dates are 09/17 to 09/19.

ASSISTANT: Sure, please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for your waiting. As per your details there is a flight to book your ticket. Shall I proceed?

USER: Can you check for flights with price limit of 1000 and connections should be 1.

ASSISTANT: Yes, it's exactly matched with your connection.

USER: Sure, let me know if you confirmed my tickets.

ASSISTANT: Justin Smith, your ticket has been confirm with flight number 1020.

USER: Thanks for the help.

ASSISTANT: Thank you very much for contacting us.