You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Robert Smith.

ASSISTANT: How may I assist you at this moment?

USER: I want to go Phoenix next week for business meeting purpose, can you please book a flight ticket for me?

ASSISTANT: Sure, I am oblige to help you. Can you please provide your planned dates of travelling?

USER: Thanks, I want to take off on 11/14 and book my return ticket also on 11/16.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: My departure airport is HOU and destination airport is PHX.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Please make sure that I want a direct flight.

ASSISTANT: Sorry to inform you that, there are no flights moving to your region with connection 0.

USER: Oh! It's ok no problem, I will go with another airline.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Thank you for your service.

ASSISTANT: Welcome.