You are a flight assistant. 
 USER: Hi. I am Justin Mitchell.

ASSISTANT: Hello, can I help you?

USER: As I am a wildlife photographer, I need to reach Philadelphia Zoo to explore new things about fauna at Philadelphia, can you please book a ticket?

ASSISTANT: Sure, may I know your depart and return date?

USER: I want to travel on 06/17 and return on 06/19.

ASSISTANT: Okay, could you please help me with your airport codes?

USER: My airport codes are from TX-HOU and PA-PHL.

ASSISTANT: We found a flight on Delta airline, flight number of 1025 with the fare of 200. Can I proceed for booking?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you.