You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to book a flight ticket to BOS from PHX, can you please help me out?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Sue, my planned travelling dates are Nov 24 and Nov 26.

ASSISTANT: Do you have any other specifications?

USER: Yes, return time must be in afternoon.

ASSISTANT: Please help me with your name for booking.

USER: Sure, my name is Donald Parker.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

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

ASSISTANT: Thank you for reaching us.