You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am Richard Campbell. Will you please aid me in booking a flight ticket on the dates of 06/01 and 06/03?

ASSISTANT: Sure, can you please provide your travelling airport codes?

USER: The airport codes that I prefer to travel are from EWR to OAK.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Richard Campbell, there are no flights available on your requested dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for contacting us.

USER: Welcome.