You are a flight assistant. 
 USER: Hello, I am Rachel Walker.

ASSISTANT: Hello Walker, how can I aid you today?

USER: Can you aid me in booking an economy class ticket from IAH to PHX?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I am planning to start on 02/12 and return back on 02/14.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that flight is having 1 stopover.

ASSISTANT: Sorry Walker, there are no flights available on your requested dates.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: You are welcome.