You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for today?

USER: Benjamin Rodriguez here. I want to travel from DC-DCA for attending a Seminar. Can you please help me for booking the flight ticket?

ASSISTANT: I am here to help you. Can you please let me know your planned dates of journey?

USER: My departure date is 10/29 and return date is 10/31.

ASSISTANT: Please provide your destination code.

USER: My destination airport code is NV-LAS.

ASSISTANT: There is a direct flight costs 100. Is it ok for you?

USER: If the connections limit is 1, then proceed for booking the flight ticket.

ASSISTANT: Unfortunately, there is no flight on your required details.

USER: Anyway, thank you for the information.

ASSISTANT: Most welcome. Hope you have a great day.