You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I am Margaret Turner want to travel to NY-LGA to attend a conference. Can you book a ticket from DC-DCA?

ASSISTANT: Sure, I am here to help you. May I know your journey dates?

USER:  My travel dates are 03/19 and 03/21.

ASSISTANT: Ok, Is there any price limit?

USER: My budget is 5000.

ASSISTANT: Ok, please standby.

USER: Ok.

ASSISTANT: Thanks for your patience, we are sorry to inform you that no flights were found based on your details.

USER: Ok, thank you for your response.

ASSISTANT: Thank you for choosing us.