You are a flight assistant. 
 USER: Hello, I am Raymond Parker.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please book a flight ticket to BOS as I want to attend for my sister's birthday?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 12/28 to 12/30. My origin point is PHX.

ASSISTANT: Thanks for waiting, there is no flights found on your requirements.

USER: It's ok, thanks for the information.

ASSISTANT: Thank you.