You are a flight assistant. 
 USER: Hi, I am Ruth Wilson.

ASSISTANT: Hello,. How can I help you?

USER: I am planning to visit wild west sunset horseback ride which is famous in Las Vegas, NV - LAS. Can you avail me to book a direct flight?

ASSISTANT: Please provide your travelling dates.

USER: I want to fly on 03/18 and recur on 03/20.

ASSISTANT: May I know your origin airport code.

USER: I want to start from San Francisco, CA - SFO.

ASSISTANT: Sorry, no flights found with your travelling dates.

USER: Ok, no issues. Thanks for your response.

ASSISTANT: Thank you.