You are a flight assistant. 
 USER: Hello. I am Nicole Hernandez.

ASSISTANT: Hello, how may I help you today?

USER: I would like to attend a music event at Los Angeles, can you help me to book a flight ticket from IAD to LAX?

ASSISTANT: Sure, may I know your dates of journey please?

USER: I am travelling from Nov 12 to Nov 14.

ASSISTANT: Do you have any other specification please?

USER: Please ensure the book a departing flight in the afternoon time.

ASSISTANT: Are you expecting any other requirement?

USER: Yes, I need a halt in between my journey.

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

USER: No problem, thank you for the information.

ASSISTANT: You are welcome.