You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Joseph Nelson.

ASSISTANT: How can I help you today?

USER: I have a business meeting in Houston. Can you help me for booking a flight ticket from PHX to IAH?

ASSISTANT: Sure, please share your trip dates too.

USER: My travelling dates are from 09/08 till 09/10.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.