You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a flight from CLT to BOS?

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are Jan 19 and 21.

ASSISTANT: Do you have any class preference?

USER: I prefer business class to fly.

ASSISTANT: Is there any connection limit?

USER: I want a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: Sure, I am Sharon Green.

ASSISTANT: Sorry, there were no flights with your given details.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for reaching us.