You are a flight assistant. 
 USER: Hello, Kathleen Perez here.

ASSISTANT: Hello, how may I serve you?

USER: I want to attend a business trip in WE - SEA on 07/26 from CA - SFO and return on 07/28. Can you book me a ticket with single connection?

ASSISTANT: Sure, please give me a moment.

USER: OK.

ASSISTANT: Thanks for waiting, I am sorry to say that there is no flights are found on your details.

USER: OK. Thanks for the information.

ASSISTANT: Thanks for choosing us. Have a good day.