You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Rachel Williams here.

ASSISTANT: Rachel, how may I aid you today?

USER: I have an important meeting in Chicago, so I need a flight ticket to go there. Can you please search a flight for me from Minneapolis?

ASSISTANT: Sure, can I know the airport codes of your mentioned locations?

USER: I want to travel from MSP to ORD.

ASSISTANT: Ok, can I know the dates on which you are interested to travel?

USER: I am planning to leave on 12/23 and please book my return ticket on 12/25. Please make sure that flight should be direct.

ASSISTANT: I am sorry Rachel, there are no direct flights available on those dates.

USER: Oh! Sad to hear that.

ASSISTANT: Thank you, have a great day ahead.

USER: Anyway, I will choose another alternative to go there. Thank you.