You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Daniel Martinez.

ASSISTANT: What guidance do you need from our travel agency?

USER: I planned to attend for a wedding in BOS, can you please help me to book a flight ticket from DTW?

ASSISTANT: Sure, I am happy to help you with the ticket booking. Can you please provide me your preferred dates of your journey?

USER: I prefer to travel on 02/19 and 02/21.

ASSISTANT: Ok, can you please hold on for a minute? So that, I can search a flight for you.

USER: Sure.

ASSISTANT: I am really sorry to inform you that, I haven't found any available flight in this route on the dates you have provided.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Thank you for your positive response and for contacting our travel agency.