You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Benjamin Nelson. I would like to attend a meeting with my client in Fisher Building at Detroit, DTW. Can you please reserve my ticket with single connection?

ASSISTANT: May I know your travel dates?

USER: My journey start on 04/19 and I arrival on 04/21.

ASSISTANT: Where would you like to leave?

USER: I want to start form Phoenix, PHX.

ASSISTANT: How much you can afford for this ticket?

USER: I can afford up to 1000 for airfare.

ASSISTANT: There is no flight on your details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.