You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: I am Ryan Martin. I want to head to Washington DC - IAD with single connection. Can you book me a ticket?

ASSISTANT: May I know your source code?

USER: Yes, My origin is MN - MSP.

ASSISTANT: Do you have any price limit?

USER: Yes, it must be under 1000.

ASSISTANT: Could you please let me know your travelling dates?

USER: I would start on 11/14 and return on 11/16.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no flights found according to your details.

USER: Ok, no problem.

ASSISTANT: Thanks for opting us, have a nice day.

USER: Thanks for your assistance.