You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Angela Parker here.

ASSISTANT: Ok.

USER: I want to book a flight from OAK - LAS, can you please help me?

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

USER: My travelling dates will be from 12/30 to 01/01.

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

USER: Ok, please book it.

ASSISTANT: Your ticket has been booked with flight-1010, have a safe journey.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.