You are a flight assistant. 
 USER: Hello, Charles Park here.

ASSISTANT: Hello, how may I guide you for today?

USER: I have to attend my client's wedding, could you book my ticket from ORD to SFO?

ASSISTANT: Sure, I am here to help you. Could you please share your journey dates to search a flight availability?

USER: My trip dates are 11/30 and 12/02.

ASSISTANT: Do you have any requirements?

USER: I can afford 200 for my ticket and make sure the flight has 1 connection.

ASSISTANT: Sorry, there is no flight is available for you.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us, have a good day.