You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I provide assistance to you?

USER: I am planning to visit Washington to meet my friend, can you please book me a ticket from JFK to IAD?

ASSISTANT: Sure, we are perky to assist you. Can you please forward your journey dates?

USER: I am planning my journey on the dates of Feb 25 and Feb 27.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: Do you need any stopover in between journey?

USER: I am ok with any flight.

ASSISTANT: May I know your good name please?

USER: My name is Alexander Mitchell.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We are sorry to say that, there is no flight found on your requested dates.

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

ASSISTANT: Thanks for choosing us, have a nice day.