You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Young.

ASSISTANT: How may I be at your service for the day?

USER: I need to attend the conference which is held at Detroit about  Stress management on 03/21.

ASSISTANT: Ok.

USER: Could you please help me in booking a ticket on 03/20?

ASSISTANT: Sure, I am perky to help you. What are your airport codes?

USER: My airport codes are New York, EWR and Detroit, DTW.

ASSISTANT: When will you catch your return flight?

USER: I intend to return on 03/22 from Detroit.

ASSISTANT: Please hold on.

USER: Sure.

ASSISTANT: Unfortunately, there were no flights available in your route.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.