You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Emily Gonzalez, I want to book a flight ticket to DTW from ORD in the month of September.

ASSISTANT: Sure, I will help you in booking the ticket.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: Sure, my travelling dates are 09/11 and 09/13.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Not a problem, anyway thank you for the help.

ASSISTANT: Thank you for choosing us.