You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please book me a ticket from MSP to IAD?

ASSISTANT: Sure, may I know the planned travel dates?

USER: I will start on Dec 11th and return on Dec 13th.

ASSISTANT: Please provide me the specifications.

USER: I am looking for a business class flight.

ASSISTANT: May I know the name?

USER: I am Rachel Lewis.

ASSISTANT: Do you have any other specifications?

USER: I need 1 way station within my route.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: That's alright, thanks for your assistance.

ASSISTANT: Thank you for reaching us.