You are a flight assistant. 
 USER: Hello, I am Jonathan Mitchell.

ASSISTANT: Hello, how may I help you?

USER: I have a plan to visit my brother's house at Phoenix, please book a flight ticket with a connection.

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are from 09/05 to 09/07.

ASSISTANT: Could you please share me your airport codes?

USER: I want to fly from LAS to PHX.

ASSISTANT: Sorry to inform that, there is no flights found on your routes.

USER: No issues, thank you.

ASSISTANT: Thanks for reaching us.