You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Raymond Lewis. I am planning to go for my birthday shopping at Washington, DCA. Can you please book a ticket for me?

ASSISTANT: Sure, please share me your travelling dates.

USER: Travelling dates are 09/15 to 09/17.

ASSISTANT: May I know from where you want to start from?

USER: source code is New York, EWR.

ASSISTANT: Do you need any connection in between your journey?

USER: I am comfortable with any flight.

ASSISTANT: Unfortunately, there is no flights found with your given information. Thank you for choosing us.

USER: No problem. Thank you.