You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Gonzalez.

ASSISTANT: How can I serve you?

USER: I have planned for luncheons with my family on Aug 15, so would you like me to book a flight ticket on Aug 14 and return ticket on Aug 16?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for accepting my request.

ASSISTANT: Do you need  halt in between the journey?

USER: Yes, I need a halt in between the journey which makes by journey comfortable.

ASSISTANT: Ok, please help me with your travelling airport codes.

USER: Sure, I want to board at MSP and land at OAK.

ASSISTANT: Ok, please hold on.

USER: Sure.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us, have a great day.