You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Melissa Carter. I would like to attend a marriage at OAK, so can you help me to book a flight from DEN?

ASSISTANT: Sure, could you please mention your willing dates to travel?

USER: My journey dates are 12/02 and 12/04.

ASSISTANT: Ok, please wait a moment I will check for available flights and let you know.

USER: Sure, my price limit is 200.

ASSISTANT: Ok, there is a flight 1024 in Southwest airline matching your details with price 100. Shall I proceed?

USER: Book that flight.

ASSISTANT: Ok, your booking is done.

USER: Thank you for your help.

ASSISTANT: You are welcome.