You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Raymond Wilson.

ASSISTANT: How can I oblige you today?

USER: I want to book a flight ticket on 10/17 and return on 10/19. Could you please reserved a plane ticket from Houston, TX-IAH?

ASSISTANT: Ok. Sure, we are perky to aid you. What is the budget for your ticket?

USER: I can up to 200.

ASSISTANT: Help me with your destination airport.

USER: I want to visit my relatives house at San Francisco, CA-SFO.

ASSISTANT: Please, wait for a while I will check the availability of planes and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no flight found to your route.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us, have a nice day.