You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Barbara Green here. I want to attend a Seminar in Seattle. Can you please help me for booking the flight ticket?

ASSISTANT: Nice to meet you Barbara. Sure, can you share your airport codes please?

USER: My airport codes are from CLT to SEA.

ASSISTANT: Now please tell me your travel dates?

USER: My travelling dates are from 11/06 to 11/08.

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

USER: Anyway, thanks for the information.

ASSISTANT: Thank you.