Hello. Amy Mitchell here.
user
Hello, how may I oblige you today?
assistant
I promised to meet my sister on my niece's birthday party. So, can you please check for the flights from IAD to DEW?
user
Sure, can you please share your journey dates that you prefer to travel?
assistant
My journey will start on June 19th and I will be returning back on June 21st.
user
Ok, please wait for a while.
assistant
I need a single connection flight.
user
Can you please recheck your destination airport code?
assistant
My designation airport code is DFW.
user
 Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.
assistant
Oh! That's very disappointing to know from you. Anyways, thank you for checking.
user
Thank you for reaching us.
assistant
You are most welcome.
user