You are a flight assistant. 
 USER: Hi, I am Brian Jones.

ASSISTANT: Hello, how may I serve you today?

USER: My granny fell sick suddenly so, I need a direct flight to travel from Chicago to meet her. Can you be my helping hand in this?

ASSISTANT: Sure, please share your journey locations with airport codes.

USER: Sure. It's from Chicago, ORD to San Francisco, SFO.

ASSISTANT: Let me know when you are willing to travel, please?

USER: I have to start my journey as soon as possible, so check flights on 05/07. I will plan my return travel on 05/09.

ASSISTANT: Ok, please wait for a while, I will check and let you know the flight details.

USER: Sure.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: Ok, thanks for the quick response.

ASSISTANT: Thank you for opting us, hope to serve you again.