You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have to visit Red Rock Canyon National Conservation Area in Las Vegas, can you please reserve a flight ticket from Dallas & Fort Worth?

ASSISTANT: Sure, can you please share your travelling dates?

USER: Thank you for your response. I am willing to travel on the dates of Sept 25 and Sept 27.

ASSISTANT: May I know your airport codes?

USER: The nearest airport codes are DFW and LAS.

ASSISTANT: Do you have any connection limit?

USER: I would like to travel in a single connecting flight.

ASSISTANT: May I know your name?

USER: Yes, my name is Emma Miller.

ASSISTANT: Do you have any requirements?

USER: The airlines which I prefer mostly is normal-cost. So, please check for that.

ASSISTANT: Sorry, no flight is available for you.

USER: Oh! It is sad to hear from your agency.

ASSISTANT: Thank you for reaching us.

USER: Anyways thank you for checking.