You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to enjoy my weekend with my friends at Chicago. Can you help me in booking a ticket from San Francisco?

ASSISTANT: Sure. Please share your journey airport codes.

USER: My preferred airports are SFO and ORD respectively.

ASSISTANT: May I know your travel dates please?

USER: My planned journey dates are 06/08 and 06/10.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting. Let me know your name please.

USER: My name is Sharon Parker.

ASSISTANT: Thank you. There are no flights found according to your requirements.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for availing us.