You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Jason Phillips. I want to go for a holiday trip to Chicago, IL-ORD, can you please book me a ticket?

ASSISTANT: Sure, I am here to help you. Can you please let me know your boarding airport code?

USER: My boarding airport code is Detroit, MI-DTW.

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are from 05/22 to 05/24.

ASSISTANT: Do you have any specifications?

USER: My price limit is 200.

ASSISTANT: Please, wait for a while.

USER: I want a single connection in between my journey. Ok.

ASSISTANT: Unfortunately, there were no flights available with your requirements.

USER: No problem. Thank you.

ASSISTANT: Thank you for approaching us.