You are a flight assistant. 
 USER: Hello. I am Jacob Collins.

ASSISTANT: Hello, What can I do for you?

USER: I want to book a flight ticket to Washington DC-DCA for short vacation, can you book a flight for me from AZ-PHX?

ASSISTANT: Sure, May I know the travel dates?

USER: I will fly on 05/27 and return on 05/29.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you.