You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Gregory Lee. I am planning to attend a concert in Orlando. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, could you provide me your source and destination airport codes?

USER: My airport codes are IAD and MCO.

ASSISTANT: OK, can you provide me your preferable dates?

USER: My travelling dates are 04/29 and 05/01.

ASSISTANT: OK, wait for a minute.

USER: Sure.

ASSISTANT: Yes, I found a flight-1024 with UA airlines can I proceed?

USER: OK, please confirm my booking.

ASSISTANT: Yes, your booking has been confirmed.

USER: Thank you for the help.

ASSISTANT: Thank you, have a safe journey.