You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Benjamin Turner. I would like to travel from SEA to DEN, can you help me to book a flight ticket?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I am travelling from June 29 to July 01.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: Please ensure that book a flight ticket in business class.

ASSISTANT: Sorry, there are no flights available with your requirement.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.