You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Melissa Perez here.

ASSISTANT: How can I aid you at this moment?

USER: Can you book a flight ticket for my airport codes that is from CLT to DFW?

ASSISTANT: Sure, I am here to help you. Can you please share your journey dates?

USER: The travel dates are from 23 Nov to 25 Nov.

ASSISTANT: Do you have any connection limit preferences for this trip?

USER: I need a single connection flight.

ASSISTANT: Do you have any other specifications for this trip?

USER: No.

ASSISTANT: May I know your good name please?

USER: I am Melissa Perez.

ASSISTANT: Melissa Perez, we regret to inform you that there are no flight services are available on this route on your provided dates.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for opting us.