You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Laura Hernandez. I would like to visit St. Paul zoo with my friends. Can you help me in booking a ticket on dates 07/28 and 07/30?

ASSISTANT: May I know your trip dates? May I know your trip location?

USER: The respective airport codes are AUS and MSP.

ASSISTANT: From AUS to MSP, there is no flight available.

USER: Its ok, thank you for the information.

ASSISTANT: Most welcome.