You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me to book a flight from JFK to MSP?

ASSISTANT: Sure. Please let me know your travelling dates.

USER: My trip dates are Jan 21 to 23.

ASSISTANT: Is there any preference?

USER: I need a connecting flight which departs in evening.

ASSISTANT: May I know your name?

USER: I am Patrick Hall.

ASSISTANT: Sorry, there are no flights with your travelling dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you. Have a nice day ahead!.