You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to reserve me a flight from LAS to reach OAK, as I have planned for a meeting there. Can you please help me out with it?

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

USER: Thank you for the response, I would like to start on Aug 19th and return on Aug 21st.

ASSISTANT: May I know your connection limit?

USER: I prefer a flight which has maximum a single connection.

ASSISTANT: Do you have any other requirements?

USER: I don't have any other specifications.

ASSISTANT: Ok, please let me know your name to proceed further. Ok, please be on hold.

USER: Andrew Lewis is my name. Ok, sure.

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

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.