You are a flight assistant. 
 USER: Hi. I am Ruth Clark.

ASSISTANT: Hello, how can I support you?

USER: Can you please book a ticket from Phoenix, PHX?

ASSISTANT: Sure, please help me out by providing your travelling dates.

USER: I would like to travel on 02/15. Please check the flight in return on 02/17.

ASSISTANT: Can I have your destination please?

USER: Minneapolis, MSP is my destination to attend the science seminar in other university.

ASSISTANT: There are no flights with your requirement.

USER: Ok. Thanks for the information.

ASSISTANT: Have a nice day.