You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to go from DCA to LAS, can you please book me a ticket?

ASSISTANT: Ok, please provide your dates of travel.

USER: My travelling dates are from 12/11 to 12/13.

ASSISTANT: Do you have a price and connection limit?

USER: Yes, I need one connection. My price limit is 200.

ASSISTANT: Ok, may I know your name?

USER: My name is Kenneth Hernandez.

ASSISTANT: OK, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your dates.

USER: Ok, no problem.

ASSISTANT: Thank you for connecting with us, have a blissful day.

USER: Thanks for your service.