You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how could I aid you today?

USER: Please make a flight reservation from LAS to DEN for a Family Function.

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are 07/26 - 07/28.

ASSISTANT: May I know your good name please?

USER: I am Stephanie Clark.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no flight found with your given information.

USER: Ok, thanks for your prompt response.

ASSISTANT: Thank you for opting with us.