You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Donna Brown. Can you please help me to search a flight from Las Vegas to Philadelphia?

ASSISTANT: Sure, can I know your preferable dates?

USER: The preferable travel dates are 03/27 and 03/29.

ASSISTANT: Ok, let me know your source and destination airport code?

USER: The airports which are near to my preferred locations are LAS and PHL.

ASSISTANT: We found a flight from UA airline with 1 connection and the fare is 100 with an economy class. Shall I proceed?

USER: Yes, please go ahead and reserve my flight ticket.

ASSISTANT: Your ticket is booked with 1009 flight number.

USER: Thanks a lot for your assistance in reserving a flight ticket.

ASSISTANT: Thank you for reaching us.