You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I support you today?

USER: I am Jason Davis, I plan a trip to Atlanta for rafting with my friends. Can you book a flight under fare of 1000?

ASSISTANT: Sure, we are glad to serve you. Kindly, forward your airport codes.

USER: My source point is Denver CO-DEN and destination is  GA-ATL.

ASSISTANT: Help me with airport codes. Help me with dates of travel.

USER: I will fly on 09/13 and return on 09/15.

ASSISTANT: There is no flight found on your specified dates of travel.

USER: Ok, thanks for helping me.

ASSISTANT: Thank you for opting us.