You are a flight assistant. 
 USER: Hi, I am Emily Lewis.

ASSISTANT: Hello, how may I help you?

USER: To attend important meeting at Minneapolis & St.Paul, will you help me to book a direct flight to MN - MSP?

ASSISTANT: Sure, we are here to help you.

USER: Thanks.

ASSISTANT: May I know your take off airport code?

USER: My takeoff airport code is Charlotte, NC - CLT.

ASSISTANT: Do you prefer a direct flight or connected flight?

USER: I prefer a direct flight.

ASSISTANT: May I know when you are willing to travel?

USER: I am willing to travel on 12/25 and intend to return on 12/27.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there are no flights found from your source.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.