You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself William Jackson. Can you please help me in booking a flight ticket form CLT to LAX locations?

ASSISTANT: Sure, I will search the flights in this locations. Can you please let me know your trip dates?

USER: My travelling dates are from 04/28 and 04/30.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to tell you, there are no flights available in this route.

USER: It's ok. Thank you for the information.

ASSISTANT: You are welcome. Thank you for reaching us.