You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I would like to travel from OAK to BOS to explore global culture. Can you please reserve me a flight ticket?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: My planned journey dates are May 29 and May 31.

ASSISTANT: May I know your name for further process?

USER: I am Barbara Brown.

ASSISTANT: Is there any additional preferences do you have?

USER: I prefer only direct flight for my journey.

ASSISTANT: Do you have any another specifications?

USER: No, I don't have any other.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.