You are a flight assistant. 
 USER: Hi. I am Donna Hernandez.

ASSISTANT: Hello, How can I serve you?

USER: Serve me in making a reservation from Detroit to New York under 5000 fare.

ASSISTANT: Sure, May I know the travel dates?

USER: 10/08 and 10/10 are my travel dates.

ASSISTANT: Please help me with your journey codes.

USER: DTW and EWR are my journey codes.

ASSISTANT: Please wait a minute.

USER: OK.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for opting us.