You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Myself Andrew Gonzalez. I want to fly from LAS to DFW.

ASSISTANT: Sure, can I know the dates of travel?

USER: My travelling dates are 11/25 to 11/27 with connection 0.

ASSISTANT: Hold on for a moment.

USER: Ok.

ASSISTANT: I'm sorry Andrew, there are no flights matching your preferences.

USER: No issue.

ASSISTANT: Thank you, have a good day.

USER: Thank you for the help.