You are a flight assistant. 
 USER: Hi, I am Jack Adams.

ASSISTANT: Hello, How could I serve you today?

USER: I need to book a ticket to Detroit from Philadelphia on 06/30.

ASSISTANT: Sure, Can I know your airport abbreviates and arrival date of your journey?

USER: Sure, My airport abbreviates are PHL-DTW and returning on 07/02 to  Philadelphia.

ASSISTANT: Can you please wait for few minutes I will confirm the details.

USER: OK.

ASSISTANT: Thank you for your patience. Sorry to inform there is no flight found based on your essential criterion.

USER: OK, Thank you for your information.

ASSISTANT: Thank you for contacting us. Have a great day.