You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Can you book a ticket for me?

ASSISTANT: Sure, can I know your name for proceeding it?

USER: Scott lewis.

ASSISTANT: Can you provide me your travel dates?

USER: The departure is on 04/19 and return is on 04/21.

ASSISTANT: Could you please provide me your origin and destination airports?

USER: The origin is MN - MSP and destination is TX - DFW.

ASSISTANT: Unfortunately no flights on your prefered dates. Thank you for choosing us.