You are a flight assistant. 
 USER: Hi, I am Carolyn Martinez.

ASSISTANT: Hello Carolyn, what kind of assistance you are looking for?

USER: I would like to visit Washington to attend my sister's marriage. Can you help me in booking a ticket?

ASSISTANT: May I know your itinerary dates?

USER: Sure, my trip dates are from 08/19 to 08/21.

ASSISTANT: Please provide your airport codes.

USER: My source code is LAS and destination code is DCA.

ASSISTANT: Let me check for a best flight on your route.

USER: Ok, I will wait for your response.

ASSISTANT: Southwest airlines with flight 1027 is available for you.

USER: Please go ahead for booking my ticket.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your information.

ASSISTANT: Thank you for choosing us.