You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to book flight ticket from LAS to JFK?

ASSISTANT: Sure, please share your journey dates?

USER: My journey dates to travel on Mar 2nd and return on Mar 4th.

ASSISTANT: Do you have any specifications?

USER: I prefer a connecting flight which return in the morning.

ASSISTANT: Is there any class preference?

USER: I am comfortable with any class.

ASSISTANT: May I know your good name?

USER: Sure, myself Dennis Wright.

ASSISTANT: Sorry, no flights found on your given details.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.