You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I favour you?

USER: My name is David Brown and I need to book a flight ticket.

ASSISTANT: Sure, please help me with your journey details?

USER: I would like to travel from DC - DCA to AZ - PHX with one connection. My journey dates from Jan/06 to Jan/8 with price limit 200.

ASSISTANT: OK, please wait i will revert you in a moment.

USER: OK, I will wait.

ASSISTANT: Thanks for waiting. Sorry, they were no flights available for your request.

USER: Thank you for your information.

ASSISTANT: Thank you for contacting us.