You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Paul Harris. I would like to conduct a meeting for special children at Philadelphia. Can you help me in my booking?

ASSISTANT: Sure, please share me your travelling dates?

USER: I will start my journey on 05/09. I will return on 05/11.

ASSISTANT: Kindly assign me your airport codes?

USER: My source airport code is Denver, CO - DEN. My destination is Philadelphia, PA - PHL.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We found 1009 Southwest airline with single connection and price of 400. Shall I proceed?

USER: Proceed with my booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you.