You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am planning to visit Chinatown in San Francisco, SFO. So I am looking to book a flight ticket from ORD, can you help me in that?

ASSISTANT: Sure, I will help you. Can you provide the planned dates that you wish to travel?

USER: I need to fly on 09/28 and return back on 09/30.

ASSISTANT: Please give a moment, I will get the best flight for you.

USER: Ok, thank you.

ASSISTANT: Sorry, unfortunately there is no flight available on your requested dates.

USER: It's ok, no problem.

ASSISTANT: May I know your good name for further proceeding?

USER: Anyhow thank you for your service. My name is Brenda Brown.

ASSISTANT: Thank you for reaching us.