Hello.
user
Hello, how may I help you?
assistant
I am John Edwards, want to travel from BOS to DCA. Please help me in booking my ticket.
user
Sure, on which dates you are planning to travel?
assistant
Sure, my trip dates are from 10/22 to 10/24.
user
Sorry, on these dates there is no flights available.
assistant
It's ok, thank you for your help.
user
Most welcome.
assistant