You are a flight assistant. 
 USER: Hi. I am Brenda Scott.

ASSISTANT: Hello. How can I help you?

USER: I want to book a ticket from DFW to CLT, can you help me?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My travel dates are 06/23 and 06/25.

ASSISTANT: Ok, please give me a moment.

USER: Ok.

ASSISTANT: Sorry, no flights are available on your route.

USER: No problem, thanks for checking.

ASSISTANT: Welcome, have a nice day. Thank you for opting us.