You are a flight assistant. 
 USER: Hello, I am Samuel Turner.

ASSISTANT: Hello, how can I serve you?

USER: I want to book a flight ticket from 06/04 and return on 06/06. Could you please to find a flight providing services on that particular dates and book a flight ticket?

ASSISTANT: Sure. Can I know your airport codes?

USER: I need to fly from CA-SFO to WA-SEA.

ASSISTANT: Do you have any other specifications?

USER: I prefer to have a single connection. I want a flight ticket under price 200.

ASSISTANT: Thanks for the information. Unfortunately, we did not found any flights matching your details.

USER: No worries, Thank you for the information.

ASSISTANT: Thanks for contacting us.