You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: Will you help me in booking the flight ticket from EWR to OAK?

ASSISTANT: Sure, please share your trip dates?

USER: My preferable journey dates are Apr 30 and May 02.

ASSISTANT: Do you need a connecting flight?

USER: I need a flight with single connection.

ASSISTANT: Do you have any other specifications?

USER: No, thank you for asking.

ASSISTANT: Can I know your good name?

USER: Myself Debra Davis.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.