Hi, I am Jack Adams.
user
Hello, How could I serve you today?
assistant
I need to book a ticket to Detroit from Philadelphia on 06/30.
user
Sure, Can I know your airport abbreviates and arrival date of your journey?
assistant
Sure, My airport abbreviates are PHL-DTW and returning on 07/02 to  Philadelphia.
user
Can you please wait for few minutes I will confirm the details.
assistant
OK.
user
Thank you for your patience. Sorry to inform there is no flight found based on your essential criterion.
assistant
OK, Thank you for your information.
user
Thank you for contacting us. Have a great day.
assistant