You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER:  My name is Melissa Walker.

ASSISTANT: How may I help you?

USER: I would like to visit Angel Island at Oakland, please help me in booking a ticket.

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

USER: My journey dates are 02/19 and 02/21.

ASSISTANT: Please provide me your airport codes.

USER: My airport codes are LAS and OAK.

ASSISTANT: I found a flight in JetBlue airlines with price 200. Shall I book the ticket for you?

USER: Ok, please book my ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1019.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.