You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Edward Wilson here, I am planning a weekend party at Charlotte.

ASSISTANT: May I know your airport codes?

USER: Please help me in booking the ticket from PHL to CLT.

ASSISTANT: Can you please mention your dates of journey?

USER: My journey dates are from 07/19 to 07/21.

ASSISTANT: Sorry Edward, no flight found for you.

USER: Ok, no issues.

ASSISTANT: Do you have any other dates to travel?

USER: No, I haven't planned for the next.

ASSISTANT: Thank you.

USER: Thank you for your help.