You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a ticket for the dates Feb 5th and 7th respectively as there is a music concert in Chicago?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: Yes, please book a ticket from LAX to ORD.

ASSISTANT: Do you want connecting flight or direct flight?

USER: Can you book a connecting flight?

ASSISTANT: Sure, do you have any other requirements?

USER: Yes, I need a business class flight.

ASSISTANT: May I know your name please?

USER: My name is Benjamin Wright.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Thank you for the help.

ASSISTANT: Thank you for opting us.