You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Debra Turner want to visit CLT, can you book a ticket from OAK?

ASSISTANT: Sure, can you please share me with your dates of journey?

USER: Sure, my travelling dates will be 08/15 and 08/17.

ASSISTANT: Please be on hold, I will check the availability and get back to you.

USER: Ok.

ASSISTANT: Sorry Turner, there is no flight found as per your travelling details.

USER: That's ok, thank you.

ASSISTANT: You are welcome.