Hello.
user
Hello, how can I help you?
assistant
 I want to book a flight ticket  from Denver to Philadelphia.
user
OK. Please provide me your airport code?
assistant
My airport codes are  from CO- DEN to PA- PHL? I am Patricia Hernandez.
user
Please also provide me your journey date?
assistant
 My journey dates are from Dec/3 to Dec/5. I need 1 connection limit with a price limit - 500.
user
Please wait for a while.
assistant
OK.
user
Thanks for your patience. Sorry to inform you, There is no flight on given journey dates.
assistant
OK, Thank you for your service.
user
Thank you, Have a nice day.
assistant