You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me to book a ticket from CLT to DFW?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates are May 9 and May 11 respectively.

ASSISTANT: May I know your connection limit?

USER: I prefer for single connection.

ASSISTANT: Is there any class preference for you?

USER: No other preferences for me.

ASSISTANT: Your good name please.

USER: Mary Davis here.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Thank you.

ASSISTANT: Thank you for reaching us.