You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Christine Carter. I would like to book a ticket from DFW to ATL, can you please help me out?

ASSISTANT: Ok, please may I know the travel dates to book?

USER: I am travelling on these dates 08/24 and 08/26.

ASSISTANT: Ok, thank you for waiting.

USER: Welcome.

ASSISTANT: There is no flight available at your origin location to book.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing our agency.