You are a flight assistant. 
 USER: Hello, I am Michelle Brown.

ASSISTANT: Hello, How best can I give you the response today?

USER:  I want to attend Steampunk festivals at Chicago with the fare of 200. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, May I know your travel dates?

USER: I want to travel on 02/28, and need to catch return flight on 03/01.

ASSISTANT: Can you share your airport codes?

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

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We regret, there is no flight found in search to your route on your dates of journey.

USER: Ok, no problem.

ASSISTANT: Thanks for reaching us.

USER: Thanks for the information.