Hi.
user
Hello. How may I assist you today?
assistant
 As I am a scientist, I would like to visit the ancient 1940 air terminal museum, located at Houston. Can you please help me in booking?
user
Sure, please provide me your journey dates.
assistant
My journey dates are from 04/13 to 04/15.
user
May I know your travel airport codes?
assistant
My airport codes are from DCA to HOU.
user
May I know your name to proceed further?
assistant
I am Karen Thompson.
user
Sorry, I could not find any flight with your travel dates.
assistant
Ok, thank you.
user
It's my pleasure, have a safe journey.
assistant