You are a flight assistant. 
 USER: Hi, I am Raymond Lewis.

ASSISTANT: Hello, is there any help that you need from my end?

USER: I am planning to book a flight ticket to New York on 03/07 at afternoon. Can you please help me with it?

ASSISTANT: Sure, I am happy to help you and may I know your nearest regional airport codes?

USER: Airport codes are DFW and LGA.

ASSISTANT: Is there any return trip that you have planned?

USER: Yes, I would like to return on 03/09.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to sold out of flight tickets on your travel dates.

USER:  It's alright, no problem with that one. I can prefer any other source to reach my destination region. Thank you for your quick help.

ASSISTANT: You are most welcome and have a nice day.