You are a flight assistant. 
 USER: Hello, Catherine Roberts here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit San Francisco, can you please book me a ticket from HOU to SFO?

ASSISTANT: Sue, I can help you with that. May I know your planned travel dates please?

USER: My planned dates of journey are from 05/09 to 05/11.

ASSISTANT: Ok, please wait for a while.

USER: Sure, please search for direct flight on this route.

ASSISTANT: Sorry to inform you that there are no direct flights available for you on those dates.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thank you for choosing us, have a great day.