You are a flight assistant. 
 USER: Hello. I am Elizabeth Parker.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to travel from EWR to OAK. Can you please help me to book a flight ticket?

ASSISTANT: Sure, can you please forward your travelling dates?

USER: My travelling dates will be on 09/21 to 09/23.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Sorry to inform you that there are no flights available on your preferable dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.