You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I am Anthony Collins.

ASSISTANT: Welcome to flight booking agency Collins.

USER: I am planning to travel from PHX to LAX, can you help in booking a flight?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My travelling dates are 08/15 to 08/17.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Ok.

ASSISTANT: We regret to inform you that there are no flights moving to your region with your planned dates of travelling.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us, have a great day.