You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a flight ticket from HOU to DFW, to attend a birthday party of my childhood friend, so can you book a flight ticket for me?

ASSISTANT: Sure, I will be happy to help you, can you please provide me your journey dates?

USER: My travelling dates are 02/10 and 02/12.

ASSISTANT: May I know your name please?

USER: My name is Kenneth Taylor.

ASSISTANT: Sorry Taylor, there are no flights available to DFW on 02/10.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for approaching us and have a nice day.

USER: You are welcome.