You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Nancy Turner here.

ASSISTANT: How can I assist you for the day?

USER: I am looking for a flight with price below 500. Can you book it?

ASSISTANT: Sure, may I know your airport codes for booking?

USER: Ok. My airport codes for boarding the flight are EWR to OAK. I need a connecting flight.

ASSISTANT: Ok, could your share your travelling dates please?

USER: My travelling dates for journey are 11/10 to 11/12.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Nancy Turner, there are no flights are available for your ticket booking .

USER: Ok, not a problem.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Thank you.