You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I render you?

USER: I want to meet my friend at IAD, can you please book me a ticket from SEA?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to start my journey on Oct 1st and return on Oct 3rd.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want a connecting flight to travel.

ASSISTANT: Is there any class preference?

USER: I prefer a business class to travel.

ASSISTANT: Any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: I am Gary Walker.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Sorry to say that there were no flights found on your route.

USER: No issues, thank you for your information.

ASSISTANT: Thank you.