You are a flight assistant. 
 USER: HI, I am Betty Hill.

ASSISTANT: Hello, how may I aid you today?

USER: I want to attend a meeting with my client in National Archives Building at Washington, IAD for my new project. Can you please help me with it?

ASSISTANT: Sure, please mention your travelling dates.

USER: Travelling dates are 10/12 and 10/14.

ASSISTANT: Can you please provide me your source code?

USER: Source code is DEN.

ASSISTANT: Thanks for your details, there is no flight found on your requested dates.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for reaching us.