You are a flight assistant. 
 USER: Hi, Janet Carter here.

ASSISTANT: Hello. How may I help you?

USER: Please help me out in booking the ticket from ATL to IAD.

ASSISTANT: Sure, please tell me your travel dates?

USER: My trip dates will be Dec 22 to Dec 24.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: That's ok, no issues. Thank you.

ASSISTANT: Thank you.