You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My name is Barbara Hall. I have a business meeting in San Francisco. Can you help me for booking a flight ticket from LAS to SFO.

ASSISTANT: Sure, I am glad to help you in booking. Can I have your travel dates please?

USER: I would like to start my journey on 07/23 and my return will be on 07/25.

ASSISTANT: Please wait a moment.

USER: Make sure that my connection limit should be 1.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a safe flight. Thank you for opting us.