You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Please reserve a flight ticket from ATL to DFW to meet my cousin in Dallas.

ASSISTANT: Sure, can you please mention with your dates of journey?

USER: Thank you for considering my request, my boarding is on Dec 18 and please book my return ticket on Dec 20.

ASSISTANT: May I know your name please?

USER: Sure, my name is Nancy Martinez.

ASSISTANT: Do you need any other specifications please?

USER: Yes, I need a connecting flight for my journey.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Nancy, there is no flight found as per your travelling details.

USER: Oh! No issues, I will reach another booking agency for my journey. Thank you for checking.

ASSISTANT: You are welcome.