You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Steven Evans here. Can you please book me a ticket from DFW to CLT?

ASSISTANT: Can I know your preferable dates?

USER: Sure, here are my travelling dates 08/07 and 08/09.

ASSISTANT: I am sorry, there are no flights matching with your preferences.

USER: No issues, thank you for the information.

ASSISTANT: Thank you, have a good day.