You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to book a flight ticket to OAK from BOS, can you please help me out?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my planned travelling dates are Mar 19 and Mar 21.

ASSISTANT: Do you have any specifications about flight connections?

USER: Sure, I am looking for a flight with 1 connection.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: Sure, my name is Mark Davis.

ASSISTANT: There is no flights found under your preferable details.

USER: It's ok, thank you for the information.

ASSISTANT: Welcome, have a great day.