You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Robert Perez.

ASSISTANT: How can I aid you?

USER: I need to book my flight ticket from Las Vegas, LAS to Washington, DCA to meet my family.

ASSISTANT: Sure, may I know your travelling dates?

USER: 03/15 - 03/17 are my willing dates for trip.

ASSISTANT: Give me a minute.

USER: Sure,.

ASSISTANT: There is  a connecting flight with fare 100 and connection is 1 in airline Spirit, the number is 1027. Can I book it?

USER: Proceed with my booking if it is a direct flight. Do not proceed.

ASSISTANT: Sorry, there is no direct flight on your requested dates.

USER: Thank you.

ASSISTANT: Thank you for opting us.