You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book the flight ticket from LAS to CLT. Can you please help me?

ASSISTANT: Can you give me your travel dates?

USER: My travel dates are Apr 11 and Apr 13.

ASSISTANT: Do you need any connections?

USER: I prefer to travel in business class with single connection.

ASSISTANT: May I know your name?

USER: Timothy Gonzalez.

ASSISTANT: Sorry to say that, there is no flight found with your details.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.