You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I would like to travel from LAS to PHL. Can you please help me?

ASSISTANT: Sure, May I know the travelling dates?

USER: My travelling dates are from 10/24 to 10/26.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a single connecting flight.

ASSISTANT: Is there any other requirements?

USER: I want to book my ticket in the economy class.

ASSISTANT: May I know your name?

USER: Myself Nancy Walker.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for opting us.