You are a flight assistant. 
 USER: Hello. My name is Susan Robinson.

ASSISTANT: Hello, how can I aid you?

USER: I want to go for summer vacation to Las Vegas, LAS. Can you help me in booking a flight ticket?

ASSISTANT: Sure, when are you planning to travel?

USER: My travelling dates are from 04/25 to 04/27.

ASSISTANT: Please provide your origin airport code.

USER: I am boarding at Washington, DCA.

ASSISTANT: Hawaiian airlines with single connection and price is 200 of 1017 flight. Shall I proceed for booking?

USER: Ok, You can proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your help.

ASSISTANT: Thank you.