You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Gary Hill. I am passionate towards books, I am planning to visit The Billy Graham library at PHL. Can you book me a ticket from OAK?

ASSISTANT: Ok, please can I know your dates of journey?

USER: I would start on June 21st and return on June 23rd.

ASSISTANT: Ok, please can I know the connection limit you prefer for the journey?

USER: Yes, I need a single lay over.

ASSISTANT: Ok, please can I know the timing you prefer for your journey?

USER: I need to depart in the afternoon.

ASSISTANT: Is there anything else to say?

USER: No, I am fine with the above essentials. Please hep me in finding a flight on my route.

ASSISTANT: Sorry, there is no flight ticket available at your source journey.

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

ASSISTANT: Thank you for choosing our agency.