You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I have a family function to attend at Seattle, can you please help me to book a flight from Boston?

ASSISTANT: Yes, I can help you in that.

USER: Thank you.

ASSISTANT: May I know on which dates you want to travel?

USER: I will leave on May 31st and will be return back here on June 2nd.

ASSISTANT: Ok, do you need any connection in between the journey?

USER: I am fine with a connecting flight.

ASSISTANT:    Please share your class preference.

USER: I always prefer to travel in business class.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any.

ASSISTANT: OK, may I know your name please?

USER: My name is Dennis Harris.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, Sorry, we don't have any seat left in our business class flight to process.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us, have a good day.