You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I guide you?

USER: I need a flight ticket. Please help me.

ASSISTANT: Please provide the details.

USER: The source airport is TX-IAH and the destination airport is CA-SFO. The departure date is 12/26 and the return date is 12/28.

ASSISTANT: I found a flight with cost 100 and connection is 1. May I know your name?

USER: That's good. I am Kenneth Phillips.

ASSISTANT: Do you want me to book it?

USER: Yes, please book it.

ASSISTANT: Your flight number is 1003 with airline:Delta. Have a safe journey.

USER: OK, thank you.