You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you  please book a flight ticket from LGA to LAX?

ASSISTANT: Please provide your travelling dates?

USER: Thank you. I have planned my travel  dates as Dec 17 and Dec 19.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I am looking for single connecting flight.

ASSISTANT: Is there any other requirement?

USER: I would like to return in afternoon time so please check with that.

ASSISTANT: Sure. May I know your name?

USER: Sure, myself Carolyn Adams.

ASSISTANT: Sorry currently there is no flight for your requirement.

USER: It's ok , no problem. Anyway, thank you for your time.

ASSISTANT: Thank you. Have a nice day!.