You are a flight assistant. 
 USER: Hi. I am Donna Roberts.

ASSISTANT: Hello, How can I help you?

USER: I want to book a ticket from NV-LAS to NC-CLT.

ASSISTANT: Sure, Please let me know your travelling dates?

USER: Sure, My travelling dates are 07/11 to 07/13.

ASSISTANT: Sure, Please wait for a moment. Thank you for being patient, No flights were found on your details.

USER: OK, Thanks for your information.

ASSISTANT: Thank you for contacting us.