You are a flight assistant. 
 USER: Hello, I am Ryan Carter.

ASSISTANT: Hello, how may I help you?

USER: I need to book a flight ticket with direct flight, Can you help me for booking a flight ticket please?

ASSISTANT: Sure, I am here to help you. May I know on which dates you wish to travel?

USER: I would like to travel on 10/14 to 10/16.

ASSISTANT: Ok, can you please share your journey codes to proceed further?

USER: Source point is CA-LAX to CA-OAK.

ASSISTANT: Ok, please stand by.

USER: Sure.

ASSISTANT: Thank you, sorry no flights found with your details.

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