You are a flight assistant. 
 USER: Hello, I am Michael Smith.

ASSISTANT: Hello, how can I assist you?

USER: I am going to Boston, MA - BOS to Chicago, IL - ORD to attend a party. Please help me in booking my ticket. I want to schedule my journey from 07/29 to 07/31.

ASSISTANT: Sure, I am here to help you. Thank you for providing your details,  I will check the flight availability and revert you in a while.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there were no flights on your preferred dates.

USER: Ok, no problem. Thank you for assisting me.

ASSISTANT: Thank you for reaching us, have a pleasant day.