You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Jennifer Evans. Can you please help me in booking my flight ticket from BOS to IAD?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Ok, my trip dates are 08/15 and 08/17.

ASSISTANT: As per your intent there are no flights available.

USER: Ok, fine thank you.

ASSISTANT: Thank you for reaching us.