Hello.
user
Hello, how can I help you?
assistant
I am Sarah Lee. I am planning to book a ticket to meet my family at BOS. Can you please help me out to book a ticket for  me?
user
Sure Sarah, may I know your source airport code please?
assistant
My nearest source code is AZ-PHX.
user
Please let me know your journey dates.
assistant
I would like to travel on 12/03 and return back on 12/05.
user
Lee, there are no flights available for you at this moment.
assistant
That's fine. Thank you for your service.
user
Thank you for choosing us, have a good day.
assistant