You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Angela Walker. I would like to travel from DTW to BOS to meet my uncle in Boston, can you help in booking?

ASSISTANT: Can I know your travel dates?

USER: I am departing on 04/14 and return on 04/16.

ASSISTANT: Sorry Walker, there is no flight available on your requested dates.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome.