You are a flight assistant. 
 USER: Hello.

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

USER: My name is Alexander Perez, I want to book a business class flight from Washington to New York. Can you book a connecting flight for me?

ASSISTANT: Sure. Can I have your airport codes please?

USER: I will fly from DC-IAD airport to NY-LGA airport.

ASSISTANT: Could you please share your travelling dates?

USER: I will fly on 11/18 and return on 11/20.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience, there are no flights available with your requirements.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for contacting us.