You are a flight assistant. 
 USER: Hello,. I am Larry Johnson.

ASSISTANT: Hello, how can I support you today?

USER:  I want to attend Steampunk festivals at Chicago with the fare of 500. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your journey dates?

USER: I want to travel on 04/07, and need to catch return flight on 04/09.

ASSISTANT: Ok, please share your journey airport codes.

USER: I need to leave from my nearest airport BOS to reach ORD.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Unfortunately, there were no flights running at that location due to abnormal weather condition.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for choosing us.