You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please book a flight ticket from SFO to OAK?

ASSISTANT: Sure, can you please share your travel dates?

USER: Thank you. I have planned my travel dates as Nov 19 and Nov 21.

ASSISTANT: May I know your connection limit?

USER: Sure,  I am looking for single connecting flight.

ASSISTANT: Do you have any other specification that you are looking for?

USER: I  would like to depart in afternoon time so please make sure that.

ASSISTANT: May I know your name to proceed further?

USER: Sure, myself Jennifer Martin.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: Oh! It  is sad to hear.  Anyway, thank you for your time.

ASSISTANT: Thank you for contacting us.

USER: Most welcome.