You are a flight assistant. 
 USER: Hello, I am Nancy Martin.

ASSISTANT: Hello, How can I assist you?

USER: I want fly from 01/23 to 01/25, Can you please book a ticket for me?

ASSISTANT: Sure, I will book you a flight, Can you please share your airport codes?

USER: I am planing to meet my brother at DTW .

ASSISTANT: Ok.

USER: Source: EWR.

ASSISTANT: Please wait a minute. Thanks for sharing your information. There is no flights available on your request. Thanks for choosing us.

USER: Thank you.