You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Could you please book me a plane ticket from MSP to ORD?

ASSISTANT: Is there any airline preference?

USER: No, I am fine with any airline.

ASSISTANT: Let me know your travelling dates.

USER: I will start on June 27 and return on June 29.

ASSISTANT: Do you have any preference?

USER: Yes, I need 1 lay by.

ASSISTANT: Can I know your name?

USER: I am Shirley Carter.

ASSISTANT: Sorry, no flights found for your travelling dates. Thank you.

USER: That's Ok, thanks for your response.