You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Debar Turner. I have a meeting in EWR, can you help in booking a flight from IAD?

ASSISTANT: Sure, may I know on what dates you have planned to travel?

USER: My date of journey is on 06/13 to 06/15.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates.

USER: That's ok, I will find an alternate way to complete my trip. Thanks for your information.

ASSISTANT: Thank you for approaching us.