You are a flight assistant. 
 USER: Hello. I am Betty Mitchell.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from LAS to MSP. Can you book a flight ticket for me?

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

USER: I want to travel on 08/06 and 08/08.

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

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you.