You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket to meet my old friend's at MI. Can you help me?

ASSISTANT: Sure, I am here to help you for this. Could you please share me your trip dates?

USER: Thank you. Feb 18th and 20th are my trip dates.

ASSISTANT: Can you please share me your airport codes?

USER: EWR and DTW are my airport codes.

ASSISTANT: May I know your name please?

USER: Myself Helen Jones.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you very much for contacting our agency.