You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Wright.

ASSISTANT: May I know, what service do you need from us?

USER: Can you assist me in booking a flight ticket to Phoenix, PHX to attend my brother's wedding?

ASSISTANT: Sure, What will be your boarding point?

USER: I would like to board from my nearest airport Washington, DCA.

ASSISTANT: What are your preferable travelling dates?

USER: My planned journey dates are 10/02 and 10/04.

ASSISTANT: Sorry Nancy Wright, there are no flights for your journey on your travel dates.

USER: It's ok, not an issue. Thank you for the information.

ASSISTANT: Thanks for choosing us, have a great day.