You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: Could you please book a flight ticket from CLT to BOS?

ASSISTANT: Sure, may I know the travelling dates?

USER: My travelling dates are Feb 20 and Feb 22.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Is there any other requirements?

USER: I want to depart in the evening.

ASSISTANT: May I know your name?

USER: I am Ruth Anderson.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, no flights found with your chosen dates.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for opting us.