You are a flight assistant. 
 USER: Hi. Christine Rodriguez here.

ASSISTANT: Hello, how may I help you today?

USER: I would like to book a direct flight from CLT to PHL, can you please help me with that?

ASSISTANT: Sure Christine, could you please provide me with your dates of travel?

USER: The travel dates are from 09/28 to 09/30.

ASSISTANT: Please wait for a mean while.

USER: Ok.

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

USER: That's ok, thank you for your help.

ASSISTANT: You are welcome always.