You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: William Campbell here.

ASSISTANT: How can I aid you?

USER: Can you book a direct flight to Detroit for my family vacation?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travel dates for the journey would be from June 04 to June 06.

ASSISTANT: Please provide me the travel airport codes.

USER: My airport codes for travel are from MSP to DTW. I am looking for a flight ticket with price below 500.

ASSISTANT: Here, there are no flights available as per your desired dates.

USER: Ok, that is not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.