You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please book a ticket from BOS to PHX? I'm planning to visit Phoenix.

ASSISTANT: Sure, can you please share me with your dates of journey?

USER: Sure, my planned departure and return travel dates are 19th and 21st of March.

ASSISTANT: May I know your good name please?

USER: My name is Ronald Evans.

ASSISTANT: Do you have any other requirements from my side please?

USER: I need direct flight.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Evans, there is no flight found as per your travelling details.

USER: That's ok, thank you for giving the information.

ASSISTANT: You are welcome.