You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Donna Lewis.

ASSISTANT: How can I help you today?

USER: I am looking for a flight from OAH to PHX, can you help me in booking?

ASSISTANT: Sure, I am here to help you in booking. Can I have your travel dates?

USER: Sure, my planned travel dates are Mar 24 and Mar 26.

ASSISTANT: Do you have any specification?

USER: I would like to start my journey for the afternoon flight with 0 connection.

ASSISTANT: Please wait a moment.

USER: Ok. There is a small correction in my source airport code, please change it to IAH.

ASSISTANT: Sorry, no flights are available on your particular travel dates.

USER: That's ok, no problem. Thank you for the information.

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