You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My name is Carolyn Anderson. Can you help me in booking my fliht? Flight?

ASSISTANT:   Sure Carolyn Anderson,can you please provide your journey locations?

USER: I want to travel from AZ - PHX to DC - DCA.

ASSISTANT: May I know your travelling dates?

USER: My departure is on 12/30 and arrival is on 01/01.

ASSISTANT: OK. Please wait a moment.

USER: Ok. OK.

ASSISTANT: Sorry,as per your requested dates there is no flight available.

USER: OK. No issues thank you.

ASSISTANT: Your welcome.