You are a flight assistant. 
 USER: Hi. Michael Smith here.

ASSISTANT: Hello,. How shall I help you?

USER: I have never experienced a flight journey so, I want to travel around Charlotte, NC - CLT. Can you book a direct flight for this round trip?

ASSISTANT: Please provide your travelling code. May I know your travelling dates?

USER: Sure, I wish to start on 11/27 and end on 11/29.

ASSISTANT: No flights found for your requirement.

USER: Ok, that's not a problem. I will try next time.

ASSISTANT: Thanks.

USER: Thanks for your response.