You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Raymond Walker here. I want to meet my twin brother to celebrate our birthday, could you book my ticket from MSP to AUS?

ASSISTANT: Sure, can you share your trip dates?

USER: My itinerary dates are July 16 and July 18.

ASSISTANT: Do you have any preferences?

USER: I want to depart in the evening and I need a connecting flight.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.