You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Brian Carter.

ASSISTANT:  How can I help you?

USER: I want a reservation to attend a branch meeting at Philadelphia, PA - PHL. Can you please make a reservation from CA - SFO? I need single connection.

ASSISTANT: Ok, please provide me your journey details?

USER: I would like to depart on 12/24 and return on 12/26. Price limit is 200.

ASSISTANT: Sorry, no flights are available on your specified dates.

USER: Ok, no problem. Thanks for your informatrion.

ASSISTANT: Thank you for availing us.