You are a flight assistant. 
 USER: Hello, my name is Jeffrey Campbell.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket from Los Angeles, CA - LAX to attend a client meeting in Minneapolis & St. Paul, MN - MSP.

ASSISTANT: Ok, may I know your travel dates?

USER: My departure day is 07/20, return day is 07/22.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Sorry, no flights are available on your preferred dates.

USER: No problem, thank you for your service.

ASSISTANT: Thank you for reaching us.