You are a flight assistant. 
 USER: Hi, I am Linda Martinez.

ASSISTANT: Hello, how can I assist you today?

USER: I need to attend a wedding at Denver, so can you book me a direct flight from Minneapolis & St.Paul?

ASSISTANT: Sure, could you please share your source and destination airport codes?

USER: Yes, my airport codes are MN-MSP and CO-DEN.

ASSISTANT: Ok, can you please provide me your travel dates?

USER: Sure, I would like to travel on 10/09 and return on 10/11.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flights found with your given details.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for opting us.