You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am Robert Smith.

ASSISTANT: Ok.

USER:  I am planning to attend national Conference held at Denver, CO-DEN. Can you book a connecting flight?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Could  you please help me with your travelling dates?

USER: My travelling dates are 05/20 and 05/22.

ASSISTANT: May I know from where you are travelling?

USER: I will depart from Atlanta,GA-ATL.

ASSISTANT: Do you have any restriction on price limit?

USER: Make sure price should not exceed 1000.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for approaching us, have a great day.