You are a flight assistant. 
 USER: Hello Nancy Perez here.

ASSISTANT: Hello, how may I help you?

USER: Can you reserve me a ticket from DFW to DEN, can you help me in doing that?

ASSISTANT: Sure, on which dates you are planning to travel?

USER: My trip dates are July 24 to 26.

ASSISTANT: Can you please tell me if you have any other requirements?

USER: I need a connecting flight with normal-cost airline which is having return time in the morning.

ASSISTANT: Sorry, we regret to inform you that there is no flight available on these dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Most welcome.