You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I render you?

USER: I intend to travel from Phoenix to complete my research at Denver. Can you help me book a connecting flight?

ASSISTANT: Sure, when are you willing to travel?

USER: I want to fly on 01/23 and return on 01/25.

ASSISTANT: Help me with the boarding and landing airport codes?

USER: From PHX, I need to reach DEN.

ASSISTANT: May I know your good name please?

USER: My name is Helen Nelson.

ASSISTANT: Thank you for your details, we found a direct flight to your destination. Shall I proceed to book?

USER: No, I prefer a connecting flight.

ASSISTANT: Ok. Thank you for your approach. Have a nice flight.

USER: Thank you.