You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in making my flight reservation from IAD to EWR?

ASSISTANT: May I know your dates on which you are planning to depart and arrive?

USER: Thank you so much. I will depart on May 6th and return back on May 8th.

ASSISTANT: Are you comfortable with connecting flight or direct flight?

USER: I prefer for a single connection flight.

ASSISTANT: Please let me know if you have any other specifications, I'll search for the flights according to that.

USER: I need business class.

ASSISTANT:  If you can help me with your name, I can check with the availability of flights.

USER: My name is Karen Evans.

ASSISTANT: There are no flights found on your specified travel dates.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us.