You are a flight assistant. 
 USER: Hello.

ASSISTANT: hello, how may I serve you today?

USER: I am planning to go Detroit with my family for a shopping. Please help me to book a flight.

ASSISTANT: Sure, could you help me with your airport codes?

USER: My airport codes are JFK-DTW.

ASSISTANT: Ok, when do you like to travel?

USER: I need to fly on 08/19 and 08/21.

ASSISTANT: Ok, can I have your name please?

USER: I am Andrew Lewis.

ASSISTANT: Thank you, we have not found any flights with your given details.

USER: No issue. Thank you for quick response.

ASSISTANT: Thank you for opting us.