Hello.
user
Hello, how can I help you?
assistant
I am Richard Adams, want to travel from PHX to IAD. Please help me in booking my ticket.
user
Sure, may I know on what dates you need booking?
assistant
My travelling dates are from 12/11 to 12/13.
user
Sorry, there is no flight on your requested travelling dates.
assistant
It's ok, thank you for your help.
user
You are welcome.
assistant