You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Donna Williams here. I have a program to attend, so could you help me to book a  ticket from AUX to PHX.

ASSISTANT: Sure, I am here to help you for this. Could you please share me your travel dates?

USER: My travel dates are May 29 and May 31.

ASSISTANT: Do you have any preference?

USER: I like to travel by direct flight and return in the afternoon.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: No issue, thank you for the help.

ASSISTANT: Thank you very much for contacting our agency.