You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Paul Robinson.

ASSISTANT: How can I guide you?

USER: I would like to travel from SFO to ORD.

ASSISTANT: Ok Paul, please tell me your travelling dates?

USER: My preferable dates are 11/01 and 11/03 respectively.

ASSISTANT: Ok, please give me a minute so that I can search for a flight on your requested route.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights found which matches with your requirements.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you, have a good day.