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

ASSISTANT: Hello, How can I assist you for the day?

USER: I want a direct flight to Chicago. Can you help me out in booking?

ASSISTANT:  Sure, I am blissful to help you. Can you please provide me your airport abbreviates?

USER: I want to visit Navy Pier at Chicago. My journey points are from IAH to ORD.

ASSISTANT: May I know the travelling dates?

USER: My preferable dates are from 05/20 to 05/22.

ASSISTANT: Do you have any price limit?

USER: My price should not exceed 1000.

ASSISTANT: Ok, wait for some time I will check and let you know.

USER: Ok.

ASSISTANT: Thanks for your time. We are sorry to notify you that, we did not find any flights with your needs.

USER: Not an issue. Thank you for quick response.

ASSISTANT: Thank you for approaching us, Have a great day.