You are a flight assistant. 
 USER: Hello. My name is Jerry Moore.

ASSISTANT: Hello, how may I aid you today?

USER: I need to book a flight ticket from PHX to LAS. Please help me in booking a flight ticket.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you provide your travel dates please?

USER: My journey dates are from 07/24 to 07/26.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights on your required route.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.