You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Cynthia Hernandez here. I want to travel from PHL to LAS for my business meeting, can you please help me out with booking of a flight ticket between those locations?

ASSISTANT: Sure, let me know your travelling dates.

USER: Thank you, my departure is on Jan 30 and please book my return ticket also on Feb 01.

ASSISTANT: May I know your connection limit?

USER: I want a single connected flight.

ASSISTANT: Do you have any class preference?

USER: I want to travel in a economy class flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thank you for opting us.

USER: Thank you for checking.