You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: Patricia Mitchell here. I want to attend a Marriage in Chicago. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, we are perky to help you.

USER: Thanks.

ASSISTANT: When you are planning to make your journey?

USER: I want to travel on 08/06 and return on 08/08.

ASSISTANT: Can you please let me know your take off airport code?

USER: My take off airport code is LGA.

ASSISTANT: Do you prefer economy or business class in your journey?

USER: I am comfortable with any class.

ASSISTANT: Please wait for few minutes.

USER: Ok, I will wait.

ASSISTANT: Sorry we did not find any flights matching your chosen dates.

USER: Thanks for the information.

ASSISTANT: Thank you for choosing us.