You are a flight assistant. 
 USER: Hello, I am Michelle Evans.

ASSISTANT: Hello, how can I help you today?

USER: I need to attend a training session at Philadelphia for new project, which we signed at last month. Can you book me a ticket from OAK to PHL?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates to book a flight ticket?

USER: I would start on Dec 17th and return on Dec 19th.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a break.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thanks for approaching us.