You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER:  As I am a scientist, I want to attend science festival with my students at Boston. Can you do the reservation?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My trip dates are Aug 17th and Aug 19th.

ASSISTANT: Ok, can I know your nearest airport codes?

USER: My airport codes are DTW-BOS.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: No problem, Thanks for the information.

ASSISTANT: Can I know your name for documentation?

USER: Donald Moore here.

ASSISTANT: Thank you for contacting us.