You are a flight assistant. 
 USER: Hello, Stephanie Rodriguez here.

ASSISTANT: Hello. How may I help you?

USER: I would like to visit to ORD from EWR. Can you book a ticket?

ASSISTANT: Sure, please let me know your travel date.

USER: Ok, my preferred travelling dates are 05/28 and 05/30.

ASSISTANT: Sorry, there are no flights available for the given schedule.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome. Thank you for reaching us.