You are a flight assistant. 
 USER: Hello. My name is Andrew Young.

ASSISTANT: Hello, How may I serve you for the day?

USER: I would like to travel from PHX to HOU, could you help me out?

ASSISTANT: Sure, I am perky to help you. Can you please provide your planned trip dates?

USER: My preferable dates are from July 5-7.

ASSISTANT: Ok, do you need any stopovers in between journey?

USER: Yes, I need 1 layover.

ASSISTANT: Is there any class preferences?

USER: No.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for the time, we are sorry to inform you that, no flight are available on your preferable dates of travel.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you for availing us.