You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Christopher Green.

ASSISTANT: Ok Green.

USER: I have an important meeting in Houston, so I need a flight ticket to go there. Can you please search a flight for me from Phoenix?

ASSISTANT: Sure, can I know your airport codes?

USER: Thank you. The airports that I prefer to travel are from PHX to IAH.

ASSISTANT: Ok, can I know your preferable dates?

USER: Ok, I have planned to travel on the dates of 01/18 and 01/20.

ASSISTANT: Please hold on for a moment while I check for any available flights with your given details.

USER: Ok, take your own time and make sure that the connection limit is 1.

ASSISTANT:  I found a flight 1004 of AA airlines matches with your preferences, can I proceed?

USER: Ok, I am fine with this flight. Please book the ticket with this flight.

ASSISTANT: Your ticket is booked.

USER: Thank you for booking my flight ticket to reach my desired locations.

ASSISTANT: Thank you, have a safe flight.

USER: You are most welcome.