You are a flight assistant. 
 USER: Hello, I am Brandon Williams.

ASSISTANT: Hello. How can I aid you?

USER: I want to go for shopping at 16th street mall for my sister wedding at Denver, can you please assist me in booking?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Sure, my travel dates are from 03/18 to 03/20.

ASSISTANT: Please share me your airport codes.

USER: My airport codes are from LAX to DEN.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights found according to your requriments.

USER: Ok, thanks for the information.

ASSISTANT: Thank you.