You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Carol Clark here.

ASSISTANT: How may I assist you?

USER: I want to travel from EWR to OAK for attending a Seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, can I have your planned travel dates please?

USER: My travelling dates are from 02/13 to 02/15.

ASSISTANT: Please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Clark, no flights has been found on your planned travel dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for approaching us.