You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jason Martinez. I would like to book a flight ticket from DFW to DTW.

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My travelling dates are Aug 24 and Aug 26.

ASSISTANT: Do you have any other preferences?

USER: I want to return in the afternoon.

ASSISTANT: Do you have any specifications?

USER: I need a economy class.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for reaching us.