You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have planned to visit Charlotte, can you help me in booking my ticket?

ASSISTANT: Sure, could you provide me the travelling dates please?

USER: My preferred dates of travelling are from 11/03 to 11/05.

ASSISTANT: Ok, what are the source and destination airport codes that you prefer to travel?

USER: My planned airport codes are from OAK to CLT.

ASSISTANT: Ok, with which name do you want to book the ticket?

USER: Ensure that it should be done on my name Stephen Robinson.

ASSISTANT: Ok Robinson, do you have any other requirements?

USER: No thanks.

ASSISTANT: Sorry to inform you that, there is no flight providing service in this route from OAK to CLT.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thanks for assisting.

ASSISTANT: You are welcome.