You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me to book my ticket from CLT to DEN?

ASSISTANT: Ok, please let me know your planned dates.

USER: My trip dates are Jul 12 and Jul 14 respectively.

ASSISTANT: May I know the connection limit you planned? May I know your name?

USER: I prefer for single connecting flight. Melissa Wilson here.

ASSISTANT: Ok, thank you for waiting. Sorry as per the intents provided there are no flights available.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing our agency.