You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me to book a flight ticket from DTW to PHX?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Thank you. My travel dates are May 30 and June 01.

ASSISTANT: Do you have any preferences about flight connections?

USER: I need a single connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: No, thanks for asking.

ASSISTANT: Please mention your name.

USER: Yes, I am Alexander Jackson.

ASSISTANT: There is no flights found under your preferable details.

USER: Ok, not an problem. Thank you for your help.

ASSISTANT: Welcome, have a great day.