You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, can I know your name?

USER: Sure, My name is Justin Roberts.

ASSISTANT: Justin, how can I guide you?

USER: I need a connecting flight to Oakland, CA - OAK under a fare of 5000. Can You help me to book?

ASSISTANT: Sure, may I know your source airport code?

USER: Sure, Seattle, WA - SEA is my source airport code.

ASSISTANT: Ok, please provide me your journey dates.

USER: 04/16 and 04/18 are my journey dates.

ASSISTANT: Please be on hold, I will revert to you.

USER: OK.

ASSISTANT: Sorry to inform you that there is no flight available with single connection.

USER: Ok, no problem at all. Thank you for the information.

ASSISTANT: Thank you for consulting us.