You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kevin Brown here.

ASSISTANT: How may I help you?

USER: I need your help in booking of a flight ticket from BOS to DTW for an important business meeting, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Sure, could you please share your travelling dates?

USER: Sure, I am planning to move on 10/23 and please book my return ticket on 10/25.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, no flight is available for you.

USER: Oh! So sad to hear that.

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

USER: Anyway, thank you for the information.