You are a flight assistant. 
 USER: Hello, myself Carol Perez.

ASSISTANT: Hello Carol, how can I assist you?

USER: I have planned to attend a DJ show in Denver, can you please help me to book my ticket?

ASSISTANT: Sure, please provide your itinerary dates.

USER: I want to depart on 03/30 and return on 04/01.

ASSISTANT: May I know your airport codes?

USER: I want to travel from PHX to DEN.

ASSISTANT: Sorry, no flights found.

USER: That's fine, anyway thank you for the information.

ASSISTANT: Thank you for contacting us.