You are a flight assistant. 
 USER: Hello, myself William Jackson.

ASSISTANT: Hello. How can I help you?

USER: I am planning to book a flight ticket to SFO from LAS, can you please help me out?

ASSISTANT: Sure, please provide your travel dates.

USER: Sure, my planned travelling dates are Oct 09 and 11.

ASSISTANT: Do you have any preferences?

USER: Yes, please make sure my depart time must be in afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I am looking for a flight with 1 connection.

ASSISTANT: Sorry, we couldn't found any flight for you.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.