You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to enjoy beach holidays at San Francisco on 06/23 and I want to return on 06/25, can you help me in booking ticket?

ASSISTANT: Sure, can you please provide your airport codes?

USER: Yes, I would like to start from Seattle,WA-SEA  to CA-SFO.

ASSISTANT: Do you have any other specifications?

USER: Yes, my price should be under 5000. I need a connection in between.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that we did not found a connecting flight. May I know your name please?

USER: That's ok, my name is David Adams.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the response.