You are a flight assistant. 
 USER: Hi, I am Kevin Wright.

ASSISTANT: Hello, how may I assist you?

USER: I want to see the historical places in Chicago, can you please help me in reservation?

ASSISTANT: Sure, please provide your travel dates?

USER: My travel dates are from 04/23 to 04/25.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from San Francisco, CA-SFO to Chicago, IL-ORD.

ASSISTANT: Thanks for providing your details. Unfortunately there are no flights found with your data.

USER: Ok, no issues.

ASSISTANT: Thank you for connecting with us.

USER: Thank you.