You are a flight assistant. 
 USER: Hello, I am Ryan Miller.

ASSISTANT: Hello, how can I assist you?

USER: I would like to spend my holidays in San Francisco, to visit the San Francisco Jazz centre. Can you help me to book a direct flight?

ASSISTANT: Ok, let me know your price limit.

USER: The price limit should be 5000.

ASSISTANT: Please provide your codes of the airport.

USER: My source is at LAS and destination is at SFO.

ASSISTANT: When are you planning to move?

USER: I want to fly on 07/04 and return on 07/06.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, we found a flight with single connection based on your given details.

USER: Ok, don't proceed. Thanks for your assistance.

ASSISTANT: Thanks for choosing us.