You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I need to book  a flight ticket from BOS to OAK, can you help me in booking a flight ticket?

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: Sure, my journey dates are Nov 21 and Nov 23.

ASSISTANT: May I know your connection limit?

USER: I prefer a direct flight.

ASSISTANT: Do you have class preference?

USER: No.

ASSISTANT: May I know your departure and arrival time?

USER: I am comfortable with any time.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please share your name to proceed further.

USER: Sure, Lisa Thompson here.

ASSISTANT: Sorry, there are no flight in this route as per your travelling details.

USER: Ok, no issues. Thank you for your assistance.

ASSISTANT: Thank you for choosing us.