You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jeffery Johnson.

ASSISTANT: How can I assist you at this moment?

USER: Can you help me in booking on 05/21 to 05/23, as there is a interview to attend at Washington?

ASSISTANT: Sure, I am happy to assist you in booking flight ticket. Can you please mention your preferable airport code names for booking flight ticket?

USER: My source is EWR and destination is IAD.

ASSISTANT: Thank you for providing your travel details, please hold on a moment, I will check flight availability in this route.

USER: Ok.

ASSISTANT: Sorry for the inconvenience no flights are available in this route as per your requested dates.

USER: No issue, thank you.

ASSISTANT: Thank you for contacting us, have a nice day Jeffery Johnson.