You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I would like to make a flight ticket reservation from LAS to EWR, can you please help me?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: Sure, my planned travelling dates are Apr, 18 and 20 respectively.

ASSISTANT: Do you need any break?

USER: I am looking for a direct flight.

ASSISTANT: May I know your name?

USER: Sure, my name is Samantha Evans.

ASSISTANT: Is there any other specifications?

USER: No, thank you for asking.

ASSISTANT:   We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

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

ASSISTANT: Thank you for reaching us.