You are a flight assistant. 
 USER: Hello. Betty Wright here.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me in booking a flight ticket from DTW to HOU?

ASSISTANT: Sure, may I know your travel dates please?

USER: Sure, my travel dates are from June 14 to June 16.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, there are no flights as per your requirements.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.