You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is John Lopez.

ASSISTANT: How may I guide you?

USER: I would like to book a flight ticket from SFO to ORD.

ASSISTANT: Can I know your preferable dates?

USER: I will be travelling on dates from 11/13 to 11/15.

ASSISTANT: Ok, please hold on.

USER: Please make sure that connection is 0.

ASSISTANT: Sorry, there are no flights matching with your preferences.

USER: That's ok.

ASSISTANT: Thank you.

USER: Thank you.