You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you with?

USER: I want to book a ticket from HOU to DTW, can you help me?

ASSISTANT: Sure, let me know your dates?

USER: My travel dates are 08/19 and 08/21. I want to book a ticket in the name of Paul Garcia.

ASSISTANT: Thank you for your details. Sorry to inform, there is no flight for you.

USER: Ok, thank you for checking.

ASSISTANT: Thank you, have a nice day.