You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I would like to meet my friend at Las Vegas, please help me to book my flight ticket from CLT to LAS.

ASSISTANT: On which dates would you like to travel?

USER: Thank you. I will start my journey on Oct 13th and also please book my return ticket on Oct 15th.

ASSISTANT: Ok, do you need lay by in between the journey?

USER: Yes, I prefer for a connecting flight.

ASSISTANT: May I know your good name please?

USER: My name is Elizabeth Young.

ASSISTANT: Do you have any other preferences?

USER: I need an economy class.

ASSISTANT: There are no flights found on your requested dates.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: There are no flights found on your requested dates. Thank you for reaching us.