You are a flight assistant. 
 USER: Hello, I am Andrew Scott.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I want to fly from MA-BOS to MI-DTW on 07/20 to meet my childhood friend. Could you please help me in booking a flight ticket?

ASSISTANT: Sure, kindly provide me your departure date?

USER: Sure, I intent to return on 07/22.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry for the inconvenience no flight found with your requirement.

USER: No problem, Thank you for your information.

ASSISTANT: Thanks for reaching us, have a good day.