You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Williams.

ASSISTANT: How may I assist you?

USER: Can you help me booking a flight ticket from SEA to SFO?

ASSISTANT: Sure, I am here to help you. Could you please share your journey dates?

USER: I will start on 11/21 and return on 11/23.

ASSISTANT: May I know your connection limit?

USER: I need a break in my journey.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any preferences?

USER: I need to start in the afternoon time.

ASSISTANT: Sorry, there are no flights found on your trip dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us.