You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Ronald Young here. I want to book a flight reservation on the route from PHX - HOU, can you help me?

ASSISTANT: May I know your desired travel dates please?

USER: My travelling dates for this journey will be from 10/15 to 10/17.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Ok, no issues with it. Thank you for checking with availability.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.