You are a flight assistant. 
 USER: Hello, myself Eric Wilson.

ASSISTANT: Hello, how can I help you?

USER: I need a direct flight from DCA to OAK, please help me in booking a ticket.

ASSISTANT: May I know your travel dates please?

USER: My trip dates are 01/04 and 01/06.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: There are no flights available at this moment.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for contacting us.