You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Richard Young.

ASSISTANT: How may i assist you today?

USER: I have a plan to meet my friend in Los Angeles, can you please help me in booking a flight ticket from ORD to LAX?

ASSISTANT: Sure, I am here to help you. Can you please share your travelling dates?

USER: My planning dates are from 12/10 till 12/12.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, no flights are  available on your route.

USER: That's ok, thank you for your information.

ASSISTANT: Welcome, have a safe journey.