You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to travel from MSP to DCA. Can you help me to book a flight ticket?

ASSISTANT: Sure, please help me with your planned dates.

USER: I want to fly in the flight on Feb 29 and Mar 02.

ASSISTANT: May I know your name please?

USER: Jack Roberts.

ASSISTANT: Do you have any connection preference?

USER: No, but I want to depart in evening time.

ASSISTANT: Do you have any other specifications?

USER: I want to return in afternoon time.

ASSISTANT: Jack Roberts, no flights has been found on your specifications.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing us.