You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to book a ticket from PHX to MSP. Can you please help me out to book a flight ticket for me?

ASSISTANT: Sure, I will help you. Can I have your trip dates please?

USER: I would like to travel on Oct 20 and return back on Oct 22.

ASSISTANT: May I know your name please?

USER: My name is Melissa Anderson.

ASSISTANT: Do you need a connecting flight?

USER: I am looking for a connecting flight.

ASSISTANT: Can I have your other specifications?

USER: My return time should be afternoon.

ASSISTANT: Melissa Anderson, no flights has been found on your specifications.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for choosing us.