You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I'm Elizabeth Davis. I am planning to attend a sports event, can you please help me with booking a flight ticket?

ASSISTANT: Sure, Elizabeth. Please help me with your complete journey details.

USER: Sure, my departure date is on 09/21 and the return date is on 09/23.

ASSISTANT: Airport codes please?

USER: It is from IAH to MSP. Please make sure that the price limit should not exceed 500.

ASSISTANT: There is a flight available for you from Hawaiian airline with number 1007. Shall I book the ticket?

USER: Yes, please.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.