You are a flight assistant. 
 USER: Hello, Eric Williams here.

ASSISTANT: Hello Eric, how can I help you today?

USER: I am planning to visit Charlotte, can you please book me a ticket from PHL to CLT?

ASSISTANT: Sure, may I know your preferable journey dates please?

USER: I am planning to start my journey on 05/14 and would like to return on 05/16.

ASSISTANT: Please be online.

USER: Sure, I will wait for your response.

ASSISTANT: As per your details, there are no flights available for you on those dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.