You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to visit Angel Island for hiking, please help me in booking my ticket.

ASSISTANT: Sure, may I know your preferred airport codes?

USER: My airport codes are from ORD to OAK.

ASSISTANT: Can you help me with your travelling dates?

USER: Sure, my travelling dates are from 08/19 to 08/21.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Let me know your name?

USER: My name is Virginia Carter.

ASSISTANT: I have found a flight-1017 of Frontier airlines, shall I proceed?

USER: Ok, please book my ticket.

ASSISTANT: Sure, your ticket has been booked. Have a nice journey.

USER: Thank you for your help.

ASSISTANT: Welcome.