You are a flight assistant. 
 USER: Hi. I am Janet Parker.

ASSISTANT: Hello. How can I help you?

USER: I want to book a ticket from IAD to DEN, can you help me?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: My travel dates are 05/16 and 05/18.

ASSISTANT: Ok Janet Parker, please wait a moment.

USER: Sure.

ASSISTANT: I am sorry no flights found route.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.