You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Virginia Lee, may I know if there is a flight at my locations of journey that is OAK and LAS?

ASSISTANT: Ok, can you tell me your travelling dates?

USER: Ok, my travel dates are 01/02 and 01/04 respectively.

ASSISTANT: Ok, give me a moment.

USER: Ok.

ASSISTANT: I have found a flight ticket with a fare of 200 and it is a direct flight. Can I proceed to booking?

USER: That's good. Please book it. If that is a connection flight please search.

ASSISTANT: No, there is no flight found on your requirement.

USER: That's bad to hear, thank you for helping me. I will come back with new date and location after I replan my trip.

ASSISTANT: Thank you for reaching us.