You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Johnson.

ASSISTANT: What can I do for you?

USER: I am planning to visit a Detroit institute of arts at Detroit. Can you please book a ticket from MAP to DTW?

ASSISTANT: May I know your travel dates please?

USER: I am planning to travel on 07/19 and return on 07/21.

ASSISTANT: I am sorry no flights found on your requirement.

USER: That's fine. Thank you for your help.

ASSISTANT: Your welcome.