You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide service to you?

USER: I am Michelle King. Can you please help me in booking a flight ticket from JFK to IAD?

ASSISTANT: Sure, may I know your scheduled travel dates?

USER: I would like to fly on Aug 25 and return on Aug 27.

ASSISTANT: Is there any class preference?

USER: I am comfortable with any class.

ASSISTANT: Please let me know your preferable timings to travel.

USER: I would like to return in the evening time.

ASSISTANT: Do you need a lay by in between the journey?

USER: Yes, I need a single connection.

ASSISTANT: Ok, please wait. I will check the availability of flights and revert to you.

USER: Ok, I would like to prefer normal cost airline.

ASSISTANT: Ok. Sorry, there were no flights found on your preferable travel dates.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for availing us.