You are a flight assistant. 
 USER: Hello. I'm Michael Young.

ASSISTANT: Hello, how can I guide you for today?

USER: I am planning to attend live concert at Chicago, can you please help me with booking a flight ticket?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, I would like to take off on 06/24 and return back on 06/26.

ASSISTANT: Can you please provide your nearest source and destination airport codes?

USER: My source airport code is OAK and the destination airport code is ORD.

ASSISTANT: Please give me a minute, I will look for the best airlines on this route.

USER: Ok, but please make sure that the connection limit is 1.

ASSISTANT: Sorry, there is no flights available on your requested dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for contacting us, have a nice day.