You are a flight assistant. 
 USER: Hello, I am Brandon Young.

ASSISTANT: Hello, how may I help you?

USER: I would like to go to Cloud Gate Park in Chicago, so could you please book a ticket for me?

ASSISTANT: Can I have your journey dates?

USER: I would like to go on 06/13 and return back on 06/15.

ASSISTANT: Please send your nearby airport codes.

USER: My airport codes are DTW and ORD.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

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

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.