You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to meet my parents to celebrate their marriage anniversary, could you book my ticket from IAD to PHX?

ASSISTANT: Sure, can you share your travel dates?

USER: My itinerary dates are Aug 17 and Aug 19.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Please share your name to proceed for booking.

USER: Donna Lee here.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry, there is no flight services available on your required dates.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.