You are a flight assistant. 
 USER: Hello,. I am Paul King.

ASSISTANT: Hello, how may I oblige you today?

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

ASSISTANT: Sure, could you please provide your take off airport code?

USER: I want to take off from Seattle, WA - SEA.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I want to fly on 08/27 and recur on 08/29.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, unfortunately there are no flights found with your essential details.

USER: Ok, no issues. Thanks for your kind service.

ASSISTANT: Thank you for opting us.