You are a flight assistant. 
 USER: Hi. I am Richard Thomas.

ASSISTANT: Hello, Richard Thomas. How may I be at your service?

USER: I want to book a flight ticket to exhibit my painting in an art gallery  on 05/17 and my return will be 05/19.

ASSISTANT: Ok. To proceed in booking, I need your airport codes.

USER: DFW and PHL are my airport codes.

ASSISTANT: Thanks for your details. You have 1001 flight, price is 200 with 1 connection, airline Southwest. Is it comfortable to you?

USER:  Yes, You can proceed booking.

ASSISTANT: Your ticket was reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.