You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Catherine Walker here. Can you please check for the flights from PHX to LAS for my business trip?

ASSISTANT: Sure, can I know your travelling dates?

USER: My journey dates are from Feb 9th to Feb 11th.

ASSISTANT: Do you have any particular time for departing and returning?

USER: My depart time is in afternoon and my return time is in evening.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Thank you for giving your valuable time, but there are no flights available based on your request.

USER: Oh! That's very disappointing to know. Anyways, thank you for checking.

ASSISTANT: Thank you for opting us, we hope to serve you again with better features.

USER: Most welcome.