You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Angela Allen here.

ASSISTANT: How can I help you?

USER: Can you please reserve me a flight ticket from SEA to DCA?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are 12/09 - 12/11.

ASSISTANT: Do you have any preferences?

USER: I need a business class with a single connection.

ASSISTANT:  Do you have any other preferences?

USER: No, thank you for asking.

ASSISTANT: sorry, I did not find any flights for you.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.