You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Patricia Hernandez, I want to book a flight to Denver to visit Red Rock Amphitheater with my friend. Can you book a flight with in fare of 500?

ASSISTANT: Sure, may I know your travel dates?

USER: I will fly on 05/16 and return on 05/18.

ASSISTANT: To book a ticket we need your preferable airport codes, can you please share me that?

USER: My source point is PA-PHL and destination airport is CO-DEN.

ASSISTANT: We found a flight on your details with airline UA, flight number: 1027. Shall I book this ticket?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you helping me.

ASSISTANT: Thank you.