You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I would like travel from Los Angeles, CA - LAX to Houston, TX - IAH. Can you book a flight ticket? My preferable dates are departure on  04/02 and return on 04/04.

ASSISTANT: Sure. May I know your name?

USER: Richard Jones is my name.

ASSISTANT: Ok, Just a minute I will revert you.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found according to your requirements.

USER: Not a problem. I will find another option. Thanks for your information.

ASSISTANT: Ok, thank you for connecting us.