You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brenda Turner.

ASSISTANT: What type of service you are expecting from us?

USER: I want to attend a Marriage in Charlotte. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am happy to help you with that. Can I know your travelling dates? Ok, please mention your airport codes.

USER: My travelling dates are from 05/04 to 05/06. My airport codes are from OAK to CLT.

ASSISTANT: Please wait for a minute.

USER: Ok, I will wait.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.