You are a flight assistant. 
 USER: Hi, Brandon Campbell here.

ASSISTANT: Hello, How can I assist you?

USER: I would like to go for a round trip with my cousin to Los Angeles, CA - LAX, so assist me in booking a flight.

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates are on 03/16 to 03/18.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's Ok. Thanks for your support.

ASSISTANT: Thank you for availing us.