You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Steven Phillips here, I want to travel to visit Los Angeles, can you please help me to book a ticket from SFO to LAX?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Sure, I would like to fly on 08/03 and back on 08/05.

ASSISTANT: Sorry Phillips, there is no flight in your route.

USER: Ok, not an issue. Thank you so much.