You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am a biology professor, I have to give a guest lecture in Oakland. Could you book my ticket from DTW to OAK?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates?

USER: My itinerary dates are 08/05 and 08/07.

ASSISTANT: May I know your name?

USER: Shirley Madison here.

ASSISTANT: Sorry, here I didn't find any flight in your route.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.