You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Could you please help me to book a ticket from PHX to BOS?

ASSISTANT: Sure, May I know the travelling dates?

USER: I want to depart on Mar 03 and Return on Mar 05.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Brian Gonzalez.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, not a problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.