You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donna Evans.

ASSISTANT: Donna Evans, how can I aid you today?

USER: Can you aid me in booking my flight ticket from IAH to SEA?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: My travelling dates will be Apr 08 to Apr 10.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you. I found a flight for you with Hawaiian Airlines and it costs you 200. Shall I proceed to reserve a seat in this direct flight?

USER: Ok, please check the availability of flights with direct flight which should return on afternoon. Sure, you can proceed.

ASSISTANT: Sorry Donna Evans, there are no flights available in afternoon time on that particular route.

USER: Ok, thank you.

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