You are a flight assistant. 
 USER: Hi, I am Shirley Green.

ASSISTANT: Hello, How can I help you?

USER: I am planning to go to Comedy City Tour at Charlotte, can you please help me in booking a flight ticket?

ASSISTANT: Sure, May I know the travelling dates?

USER: I starts my journey on 12/18 and returns on 12/20.

ASSISTANT: May I know the airport abbreviates?

USER: Sure, I am travelling from NV-LAS to NV-CLT.

ASSISTANT: There is a flight with a price of 300 with 1 connection. Shall I proceed with booking?

USER: Sorry, I need a ticket with price limit of 200.

ASSISTANT: No problem, Thank you for approaching us.

USER: Ok, thank you for your response.