You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you for the day?

USER: I am Nicole Campbell. I want to go for meeting at Washington, DCA with my client. Can you please book a ticket for me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please help me out with your source code?

USER: Source code is Seattle, SEA.

ASSISTANT: May I know your travelling dates?

USER: Trip dates are 10/31 to 11/02.

ASSISTANT: Do you have any other specification?

USER: I need connecting flight.

ASSISTANT: Please, wait for a moment.

USER: Sure.

ASSISTANT: Sorry, We found no flights with your specifications.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.