You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to visit my parents home this holidays. Can you book me a ticket from 11/05 and 11/07?

ASSISTANT: Ok, may I know your airport codes?

USER: I will fly from NV-LAS to TX-DFW.

ASSISTANT: Do you any connection limit?

USER: I need single connection with fare 500.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform, no flight found with your requirement. Could you please share your name?

USER: Thank you for your response. I am Mark Edwards.

ASSISTANT: Thanks for reaching us, have a good day.