You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book flight ticket from BOS to PHX?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My trip dates are Dec 22 and Dec 24.

ASSISTANT: Ok, please share your name.

USER: I am Michelle Baker.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Please check with direct flight.

ASSISTANT: As per your request, I have rechecked but no flights are available on your planning dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.