You are a flight assistant. 
 USER: Hello, myself Jonathan Mitchell.

ASSISTANT: Hello Mitchell, how can I assist you?

USER: I am looking for a direct flight from Washington, please help me in booking a ticket from DCA to LAX.

ASSISTANT: Sure, may I know your journey dates please?

USER: My journey dates are 05/31 and 06/02.

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.