You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Dorothy Phillips here. I need a flight ticket on 06/18 and back on 06/20 to enjoy our vacation in my friends house, will you help in that?

ASSISTANT: Sure, could you please mention your source and destination airports codes?

USER: OAK and LAS are my nearest airport codes.

ASSISTANT: Ok, please wait for a mean while.

USER: Sure.

ASSISTANT: I found a flight with connections limit is 1 of cost 100.Shall I proceed with this booking of a ticket?

USER: I need a direct flight, can you please check?

ASSISTANT: Sorry, there is no flights found which is direct for you.

USER: Ok, no issues with that.

ASSISTANT: Thank you for your service.

USER: Thanks for your service.

ASSISTANT: You are welcome.