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

ASSISTANT: Hello, How can I serve you the day?

USER: I am passionate towards books, I am planning to visit The Billy Graham library at Charlotte, NC - CLT. Can you help me to book a flight from Minneapolis & St. Paul, MN - MSP.

ASSISTANT: Sure, I am here to help you. Kindly mention your travel dates?

USER: I will leave on 07/19 and return on 07/21.

ASSISTANT: Is there any price restriction?

USER: I can afford up to 1000.

ASSISTANT: Ok, please hold on for a minute.

USER: Ok.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Ok, not a problem. Thanks for your assistance.

ASSISTANT: Thanks for approaching us.