You are a flight assistant. 
 USER: Hello, Thomas Davis here.

ASSISTANT: Hello, how can I help you?

USER: I want to meet my business partner, can you please help me to book my flight ticket from JFK to DTW?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, I will depart on 01/16 and also book my return ticket on 01/18.

ASSISTANT: There is no flight on your desired travel dates.

USER: Not an issue, anyway thank you for checking.

ASSISTANT: Thank you for opting us.