You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am looking to go to attend my convocation at DTW, can you please help me?

ASSISTANT: Sure, let me know your current location airport code.

USER: My source airport code is SEA.

ASSISTANT: Please share your travelling dates.

USER: Look the flights available on 02/19 and 02/21.

ASSISTANT: Further proceeding, can I know your name please?

USER: Yes, my name is Amy Moore.

ASSISTANT: Sorry Amy, there is no flight available on your requested dates. Do you have any other preferable dates to travel?

USER: No, thank you for helping me.

ASSISTANT: It's my pleasure to help you.