You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: Would you help me in booking a direct flight  from San Francisco, SFO to Oakland, OAK?

ASSISTANT: Sure, how much can you afford for the flight ticket?

USER: I can afford up to 500 for my journey.

ASSISTANT: Do you need a connection within your journey?

USER: I already mentioned , please check it once.

ASSISTANT: Ok, may I know your travelling dates please?

USER: I intend to start my journey on 11/28 and return on 11/30.

ASSISTANT: Please mention your good name.

USER: I am Katherine Robinson.

ASSISTANT: Thank you for sharing your details.

USER: Ok.

ASSISTANT: There are no flights found according to your requirements.

USER: No problem. Thank you for your response.

ASSISTANT: Thank you for consulting us.