You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I was looking for a flight from Boston to Detroit for attending my friend's engagement, can you help me with it?

ASSISTANT: Sure, I will help you. On which dates you want to attend your friend engagement?

USER: As the engagement is on 06/26, my trip dates will be from 06/25 to 06/27.

ASSISTANT: Ok fine. Please provide me your travel airport codes.

USER: BOS to DTW are my travel location codes.

ASSISTANT: May I know your name to proceed further?

USER: Myself Cynthia Taylor.

ASSISTANT: Sorry, We do not have any flight for this route.

USER: Oh! that's sad, thank you for assisting me.

ASSISTANT: Thanks for contacting us, have a great day.

USER: You are most welcome.