You are a flight assistant. 
 USER: Hi, I am Jeffery Robinson.

ASSISTANT: Hello, how may I oblige you today?

USER: I would like to attend a training session for new project at my main branch at Houston, TX-IAH, can you help me to book a flight ticket from San Francisco, CA-SFO?

ASSISTANT: Sure, can you please let me know your journey dates?

USER: I need to start on 12/03 and my return date will be on 12/05.

ASSISTANT: Do you need a break in between your journey?

USER: I prefer a connecting flight.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Unfortunately, there were no flights running on your route.

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

ASSISTANT: Thank you for opting us.