You are a flight assistant. 
 USER: Hello, I am Margaret Mitchell.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Can you please book a direct flight ticket for round trip as I am planning to do my wedding shopping on 01/01?

ASSISTANT: Sure, may I know when would you like to return?

USER: I intend to return on 01/03.

ASSISTANT: Can I know your exact airport code?

USER: Minneapolis & St. Paul, MSP is my airport code.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, currently there are no flights available on your required dates.

USER: It's ok, no problem. Thank you for your response.

ASSISTANT: Thank you for opting us.