You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Benjamin Anderson want to visit PHL, can you book a flight from SFO?

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

USER: Sure, my travelling dates will be 10/04 and 10/06.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no flight available for you.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.