You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Jerry Smith here. I want to meet my cousin to celebrate his birthday, could you book my ticket from IAH to DTW?

ASSISTANT: I am very glad to help you, may I know your preferable dates?

USER: My itinerary dates are 10/05 and 10/07.

ASSISTANT: Just give a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your desired route.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.