You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Kathleen Clark, want to travel from LAX to CLT. Please help me.

ASSISTANT: Sure, I am here to help you. When would you like to travel?

USER: My travelling dates are from 10/16 to 10/18.

ASSISTANT: Just a moment.

USER: Ok.

ASSISTANT: Clark sorry to inform that, no flights are available with you requirements.

USER: That's fine, thank you.

ASSISTANT: You are welcome.