You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I aid you?

USER: I am Melissa Hernandez. I would like to attend women's fashion parade which is organised by my cousin in Philadelphia, PHL.

ASSISTANT: Sure, please let me know your planned dates.

USER: Can you please make a reservation on 03/28 and 03/30?

ASSISTANT: Kindly mention your origin please.

USER: My source point is Oakland, OAK.

ASSISTANT: Sorry, there are no flights with your requirement.

USER: Ok, no issues. Thank you.

ASSISTANT: Have a great day.