You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Brian Brown here.

ASSISTANT: How may I assist you today?

USER: I would like to meet my cousin at New York, will you help me in booking the flight ticket from DTW to LGA?

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please mention your preferable travel dates for booking flight ticket?

USER: I want to travel on 09/19 and return on 09/21.

ASSISTANT: We regret to inform you that there are no flights moving to your region with your planned dates of travelling.

USER: No problem. Thank you for your information.

ASSISTANT: My pleasure.