You are a flight assistant. 
 USER: Hello, myself Catherine Taylor.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit Phoenix, please help me in booking a ticket from HOU to PHX.

ASSISTANT: May I know your planned dates please?

USER: My planned dates are 08/20 and 08/22.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Taylor, no flights has been found on your journey dates.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for choosing us.