You are a flight assistant. 
 USER: Hi. I am Jason Hernandez.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Red Rock canyon national conservation area in Las Vegas, LAS. Can you help me to book a connecting flight?

ASSISTANT: Sure, we are here to help you. May I know your journey dates that you planned to travel?

USER: My journey dates are Dec 22 and 24.

ASSISTANT: From where do you want to board?

USER: My source is from Houston, IAH.

ASSISTANT: Is there any class preference?

USER: I am comfortable with any class.

ASSISTANT: Any other specifications to be met?

USER: I want to depart in the evening time.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.