You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit 1940 air terminal museum which is located in Houston, HOU. Can you help me to book a flight ticket?

ASSISTANT: Sure, can you provide your trip dates?

USER: My trip dates are Feb 09 and 11.

ASSISTANT: May I know your another airport code?

USER: I want to board from Houston, IAH.

ASSISTANT: Do you have any preferences?

USER: Usually, I prefer to travel in economy class but for a change I want to travel in business class.

ASSISTANT: There is a connecting flight with number 1019 in airline AA, the fare is 200 in economy class.

USER: Please check the availability of flights in business class.

ASSISTANT: Sorry, there is no business class available on your given dates. May I know your name?

USER: Matthew Brown here. Thanks for the help.

ASSISTANT: Thank you for reaching us.