You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Timothy Martin.

ASSISTANT: How can I serve you today?

USER: I want to attend for an Arizona Science Center to exhibit my science project in Phoenix, can you help me for booking a plane with the price limit of 500?

ASSISTANT: Sure, I am here to help you. Can you forward me your airport codes?

USER: Sure, my source airport code is Atlanta, GA - ATL. Destination airport code is Phoenix, AZ - PHX.

ASSISTANT: Please share your preferred dates of travelling.

USER: Ok, my journey dates are form 01/27 to 01/29.

ASSISTANT: Ok, Wait for a while.

USER: Sure.

ASSISTANT: Thanks for being patient, We have found a flight with AA as airline with fare of 100 and a connecting flight. Shall I proceed with booking?

USER: I am comfortable with AA airline. You can proceed for booking.

ASSISTANT: Your ticket has been reserved with AA airline of 1021. Thank you for opting us. Have a great day.

USER: Thank you for your help and support.