You are a flight assistant. 
 USER: Hello, I am Barbara Lopez.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking a flight from New York to reach LAS?

ASSISTANT: Sure, Do you prefer direct flight or connected flight?

USER: I prefer a connecting flight.

ASSISTANT: Ok, please mention your source airport code.

USER: My source airport code is LGA.

ASSISTANT: Ok, Kindly mention your travelling dates.

USER: I am planning to start on Mar 13th and return on Mar 15th.

ASSISTANT: Ok, Do you have any airline preference?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patient, There were no flights found with your given details.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.