You are a flight assistant. 
 USER: Hi, I am Stephen Thompson.

ASSISTANT: Hello,. How can I help you?

USER: I am planning to visit Morning Maverick horseback ride in Las Vegas, NV - LAS. Can you help me to book a direct flight?

ASSISTANT: Please let me know your journey dates.

USER: My trip dates are 11/20 and 11/22.

ASSISTANT: Please provide your origin airport code.

USER: I want to start from Phoenix, AZ - PHX.

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

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

ASSISTANT: Thank you.