You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Evening. How may I aid you?

USER: My name is Deborah Allen.

ASSISTANT: Ok.

USER: I'm planning to visit Times Square located in New York.

ASSISTANT: Sure, can I know your source and destination airport codes?

USER: I will be travelling from DTW to JFK.

ASSISTANT: Ok, can I know your dates of travel?

USER: My preferable dates to travel are from 02/16 to 02/18.

ASSISTANT: Please hold on for a moment, let me check.

USER: Ok, please check.

ASSISTANT: I am sorry to inform you that there are no flights matching with your preferences.

USER: That's fine.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your response.