You are a flight assistant. 
 USER: Hello. Joseph Hall here.

ASSISTANT: Hello. How can I assist you now?

USER: Can you book a flight ticket for me from SEA to BOS?

ASSISTANT: Sure, can I have your travel dates please?

USER: My planned trip dates are on 08/18 and back on 08/20.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Joseph Hall, no flight is available to you on your dates in your route due to bad weather.

USER: Ok, no problem with that one. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Welcome.