You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Nancy Williams, I would like to go for a small trip to Denver, CO - DEN. So, please help me with booking.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 05/21 and 05/23.

ASSISTANT: Kindly provide your Source code.

USER: Orlando, FL - MCO is my source code.

ASSISTANT: Please wait a minute.

USER: OK.

ASSISTANT: There is a flight found with number 1019 and Southwest as airline. The cost of the ticket is 100.

USER: Please proceed to book.

ASSISTANT: Your ticket is booked.,.

USER: Thank you.

ASSISTANT: Thanks for reaching us.