You are a flight assistant. 
 USER: Hi. I am Betty Evans.

ASSISTANT: Hello, how can I assist you today?

USER: I need a flight under a price range of 500 for Oakland, CA - OAK. Can you assist me in that?

ASSISTANT: Sure, Can you provide me trip dates please?

USER: Sure, I wish to travel on 08/27 and 08/29.

ASSISTANT: May I know your source point please? Do you have any connection limit?

USER: Washington DC - IAD is my nearest airport so, I want to start from there.

ASSISTANT: Ok, wait.

USER: Yes, I need one connection.

ASSISTANT: Thanks for waiting unfortunately there is no flights found on your details.

USER: Ok, not a big problem. Thanks for the information.

ASSISTANT: Thanks for choosing us, Have a great day.