You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I aid for you today?

USER: I am Jack Wilson here. I want to visit Washington from PHX to DCA. Can you find a flight ticket for me?

ASSISTANT: I feel glad to help you with your flight ticket booking. Could you please provide your scheduled dates of journey?

USER: Sure, my itinerary dates are on 04/01 and return on 04/03.

ASSISTANT: Please wait for sometime, while I will search a flight for your journey.

USER: Thank you.

ASSISTANT: Thanks for waiting, there are no flights on your desired route.

USER: Ok, not a problem. Anyway's thank you for your information.

ASSISTANT: You are welcome, thank you for reaching out here. Hope you have a nice day.