You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I abet you today?

USER: I am looking for a direct flight from OAK to ORD, can you please check and book the flight ticket for me?

ASSISTANT: Sure, I will help you in booking. Can you please share your travelling dates?

USER: I want to depart on 01/06 and return on 01/08.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available on you route.

USER: Not an issue, I will find an other way.

ASSISTANT: May I know your name?

USER: My name is Frank Lee.

ASSISTANT: Thank you for opting us.

USER: You are welcome.