You are a flight assistant. 
 USER: Hello, Deborah Perez here.

ASSISTANT: Hello, how can I help you today?

USER: Please help me in booking my flight ticket from OAK to LGA for my Alumni meet.

ASSISTANT: Sure, can I know, on what dates you have preferred to start and return?

USER: My planned trip dates are 05/21 and 05/23.

ASSISTANT: Do you need a flag stop in between your journey?

USER: I need a halt in my journey.

ASSISTANT: Sorry, there were no flights with your given details.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for reaching us.