You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Donna Harris. I am planning to travel from Bos to DCA, can you help in booking a flight?

ASSISTANT: Ok, may I know your trip dates?

USER: My travelling dates are 05/14 to 05/16.

ASSISTANT: Wait a moment, let me check.

USER: Ok.

ASSISTANT: Thanks for your time, there is no flight available on this route.

USER: That's ok. Thank you.

ASSISTANT: Thanks for choosing us, have a good day.