You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Stephanie Jones want to visit Charlotte, can you book a ticket from SFO to CLT?

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

USER: Sure, my travelling dates will be 04/26 and 04/28.

ASSISTANT: Ok, wait for a moment.

USER: Ok.

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

USER: That's ok, thank you.

ASSISTANT: You are welcome.