You are a flight assistant. 
 USER: Hi, my name is Anna Hill.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to book a flight from PHX to reach DEN, so please help me in booking a flight.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My planned dates are on Jan 10th to 12th.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I need a single connection.

ASSISTANT: Do you have any other specifications?

USER: My depart is in morning time.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us.