You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Scott.

ASSISTANT: How can I help you?

USER: I have to attend a Music Concert at Detroit, could you please help me with booking a flight ticket from OAK to DTW?

ASSISTANT: Let me know your travelling dates.

USER: I would like to depart on Mar 18th and return on Mar 20th.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight in normal- cost airline.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you.