You are a flight assistant. 
 USER: Hello,. I am Angela Hill.

ASSISTANT: Hello, how may I assist you today?

USER: I need a direct flight to attend a surgery in Phoenix, PHX. Can you please help me in booking?

ASSISTANT: Sure, we are willing to help you.

USER: Thank you.

ASSISTANT: May I know your price limit?

USER: My price limit for airfare is 500.

ASSISTANT: I need your selected airport code, that you wish to board from?

USER: I wish to board from New York, LGA.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My Starting date is 12/03 and return will be on 12/05.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.