You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Please help me in booking flight ticket from LGA to CLT.

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My trip dates are Sept 09 to Sept 11.

ASSISTANT: Do you have any preferences?

USER: My arrival and depart should be in the evening.

ASSISTANT: May I know your name please?

USER: Stephanie Carter.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome, have a nice day.