You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking my flight ticket from IAD to PHX?

ASSISTANT: Sure, I am here to help you out. May I know your travel dates please?

USER: Thank you and my travelling dates are from 08/12 to 08/14.

ASSISTANT: Can you please share your name for documentation purpose?

USER: Myself Katherine Thompson.

ASSISTANT: Is there connection preference?

USER: Yes, I need a single connecting flight.

ASSISTANT: Do you have any other specifications to be met?

USER: No.

ASSISTANT: Katherine Thompson, there are no flights available in your route with your preferences.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.