Hi,.
user
Hello, how can I serve you?
assistant
 I am Debra Allen. Please, book me a direct flight to attend surgery in Denver, DEN.
user
Sure.
assistant
Thank you.
user
Can I know your boarding airport code?
assistant
My boarding airport is Philadelphia, PHL.
user
Could you please share your travelling dates?
assistant
07/01 - 07/03 are my trip dates.
user
Please, wait for a while.
assistant
Sure.
user
Thank you for waiting.
assistant
Ok.
user
There are no flights available with your requirements.
assistant
Ok, I will choose other airline. Thank You.
user
Thank you for reaching us.
assistant