You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jeffrey Carter here.

ASSISTANT: Carter, how can I assist you today?

USER: I am looking a flight from DTW to IAD, can you help me?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: My trip dates are 01/07 and 01/09.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, no flights available as per your requested dates.

USER: Oh! not an issue.

ASSISTANT: My pleasure, have a good day.