You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in reserving a ticket from LAS to LGA?

ASSISTANT: It's my pleasure to help you with your concern. May I know your preferred dates of journey?

USER: My journey dates are May 31 to June 02.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I need a direct flight.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Could you help me with your name please?

USER: Dennis Harris here.

ASSISTANT: Thank you for confirming all your necessary details, regret o inform that there is no direct flight available for the mentioned dates.

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

ASSISTANT: Thank you for reaching us.