You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Elizabeth Turner, can you help me to book a flight ticket from IAD to JFK?

ASSISTANT: Sure, can you share your travel dates please?

USER: Yes, my travel dates are 03/30 and return date is 04/01.

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

USER: Ok, not a problem.

ASSISTANT: Thank you.

USER: Thank you for the information.