You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: I am Michelle Nelson.

ASSISTANT: OK.

USER: Can you please book a ticket to Chicago, ORD?

ASSISTANT: Sure,  please share me your source airport code?

USER: Source is Oakland, OAK.

ASSISTANT: May I know when you are starting from Oakland?

USER: To participate in the quiz competition on behalf of our college, I need to start on 01/19.

ASSISTANT: Do you have any specifications?

USER: Yes, please check with the connecting flights.

ASSISTANT: May I know your return date please?

USER: 01/21 is the arrival date.

ASSISTANT: OK, please hold on.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: It's Ok.

ASSISTANT: We are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Ok. I will go with other alternative.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Thank you.