You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best assist you now?

USER: Can you help me in booking the flight ticket from DTW to IAD?

ASSISTANT: Can you please let me know your travelling dates?

USER: My preferable journey dates are June 17 and June 19.

ASSISTANT: Do you have any class preference?

USER: I am comfort with any class.

ASSISTANT: May I know your name?

USER: My name is Virginia Anderson.

ASSISTANT: Is there any other specifications?

USER: I prefer to return in morning flight.

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Virginia Anderson, based on your required specialisations we haven't found any flight in airline database.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thanks for reaching us.