You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Joseph Moore. Can you please booking my flight ticket from PHX to SEA?

ASSISTANT: Please share your journey dates.

USER: My travelling dates are Sept 08 and Sept 10.

ASSISTANT: Do you need any class preference?

USER: no. I need evening flight while I start my journey.

ASSISTANT: Sorry to inform you there is no flights found in our database.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for choosing us.