You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: Can you help me to book a direct flight?

ASSISTANT: Sure, please provide your trip dates.

USER: My travelling dates are Aug 04 and 06.

ASSISTANT: Can I know your airport codes?

USER: I would like to travel from CLT to JFK.

ASSISTANT: Do you need any connection limit?

USER: I prefer direct flight.

ASSISTANT: Do you need any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: My name is William Gonzalez.

ASSISTANT: There are no flights available on your routes.

USER: No issues, thank you for your response.

ASSISTANT: Thank you for choosing us.