You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to meet my sister on her birthday, could you book my ticket from OAK to AUS?

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

USER: My itinerary dates are Apr 13 and Apr 15.

ASSISTANT: May I know your connection limit?

USER: I want single stopover in my journey.

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

USER: I want to return from Austin in the evening.

ASSISTANT: May I know your name to proceed further?

USER: Amanda Adams here.

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

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.