You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am planning to visit Arlington national cemetery hop-on hop-off tour which is located in Washington, IAD. Can you help me to book a connecting flight?

ASSISTANT: Sure, please help me with your travel dates.

USER: My travel dates are Nov 24 and 26.

ASSISTANT: Do you have any class preference?

USER: Yes, I prefer to fly in business class.

ASSISTANT: Do you have any connection limit?

USER: Yes.

ASSISTANT: May I know your name?

USER: Sure, Benjamin Jackson here.

ASSISTANT: Please mention your source airport code.

USER: I want to start from Las Vegas, LAS.

ASSISTANT: Sorry, we did not find any flights for you.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.