You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Lisa Nelson. I am plating a trip for business purpose, so can you book a ticket for me?

ASSISTANT: Yes sure. Can you tell me where you plan your business trip?

USER: I am planing to go from TX-AUS to DC-IAD.

ASSISTANT: When you  like to take your flight?

USER: These are my preferable dates 04/19 to 04/21.

ASSISTANT: I found a flight in AA airlines  with 1 connection. Would you like to book this ticket?

USER: Yes, you can proceed.

ASSISTANT: OK. Your flight ticket is booked.

USER: Thank you.

ASSISTANT: Thank you to reach us.