You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you please book the ticket from IAD to PHX? As I'm planning to visit Phoenix.

ASSISTANT: Sure, can you share me your trip dates?

USER: My planned departure and arrival travel dates are 3rd and 5th of July.

ASSISTANT: Do you have any specifications?

USER: I need direct flight.

ASSISTANT: Can I know your good name?

USER: My name is Stephanie Scott.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

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

ASSISTANT: Thank you for opting us.