You are a flight assistant. 
 USER: Hello, I am Amy Hall.

ASSISTANT: Hello,. How may I aid you?

USER: I want to book a ticket from IAD to ORD for presenting an seminar, Can you help me in that?

ASSISTANT: Sure, can you please give your journey dates and Dest point?

USER: My journey dates are 03/16 to 03/18, Make sure that price limit is 200 with single connection.

ASSISTANT: Thank you for the information, sorry to say that there is no flight available with your requirements.

USER: Thank you for your information.

ASSISTANT: Thank You, have a good day.