You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to visit Oakland, please book a ticket from OAK to OAK.

ASSISTANT: Sure, may I know your travel dates please?

USER: My journey dates are 03/18 and 03/20.

ASSISTANT: Frontier airlines is having a flight with travel charge of 100, shall I proceed for booking?

USER: Ok, please book my ticket with he name Carolyn Roberts.

ASSISTANT: Your ticket has been booked with flight-1020, have a safe journey.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.