You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to book a direct flight flight to meet my cousin, can you help me with booking?

ASSISTANT: Sure, please share your trip dates?

USER: My trip dates are Apr 12 and Apr 14.

ASSISTANT: Can you please share your airport codes?

USER: My source code is DFW and destination code is MSP.

ASSISTANT: Do you prefer any specification?

USER: My return time is evening.

ASSISTANT: Sorry, no flights found in the evening.

USER: Ok, no issues.

ASSISTANT: May I know your name?

USER: I am Joseph Lopez.

ASSISTANT: Thank you.

USER: Thank you.