You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I serve you today?

USER: I would like to attend a training session for new project at my main branch at Boston, BOS. Can you book a ticket from Washington, IAD?

ASSISTANT: May I know your journey dates?

USER: I want to travel on 11/05 and intend to return on 11/07.

ASSISTANT: May I know your name?

USER: My name is Betty Turner.

ASSISTANT: Sorry, there are no flights available.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for availing us.