You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need to travel from IAD to EWR, can you help me in doing that?

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: Kevin Moore here.

ASSISTANT: Please help me with your planned travelling dates.

USER: My trip dates are Aug 20 to 22.

ASSISTANT: Do you need a break in between your journey?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: I prefer normal-cost airline.

ASSISTANT: Please allow me a minute.

USER: Sure, take your time.

ASSISTANT: Kevin Moore, I am really sorry to inform you that there are no flights available for your journey.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us. Have a great time.