You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Patricia Rodriguez here. Can you please help me in booking the ticket from SFO to ORD?

ASSISTANT: May I know your desired travel dates please?

USER: My journey starts on 01/29 and ends on 01/31. Please search for a direct flight.

ASSISTANT: There is no flight on your desired travel dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us.