You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: I have to participate in Comic Con show, so I need to be there without fail. So, book a ticket to IAD.

ASSISTANT: Sure, Can you please assign your journey dates?

USER: My scheduled program is in between dates 11/30 to 12/02.

ASSISTANT: Ok, please share your source details.

USER: I am starting from Oakland, OAK.

ASSISTANT: Fine, please give me a moment.

USER: Sure.

ASSISTANT: Thanks for your time, we are sorry to inform you that no flights were found based on your schedule. May I know your name?

USER: Ok, Thank You for sharing information. And I am Paul Mitchell.

ASSISTANT: Ok, Paul Mitchell, Thanks for opting our service.

USER: Ok.

ASSISTANT: We hope to serve you again.