You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Margaret Perez here. I want to attend a Marriage in San Francisco. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, please share your dates of travel?

USER: My travelling dates are 11/23 and 11/25.

ASSISTANT: Can you please mention your airport codes?

USER: My airport codes are ORD and SFO.

ASSISTANT: Is there any connection limit?

USER: I want to prefer single connection limit flight.

ASSISTANT: Do you have any class preference?

USER: No, but I want to departure on afternoon.

ASSISTANT: Ok, please wait a minute.

USER: Ok, I will wait.

ASSISTANT: Sorry, there were no flights found on your specified time.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.