You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Robert Mitchell.

ASSISTANT: How may I help you?

USER: I have a meeting to attend at Philadelphia. Can you help me in booking a ticket from ATL to PHL?

ASSISTANT: Sure, please provide your travelling dates.

USER: My planned journey dates are 04/27 and 04/29.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: Robert, no flights has been found on your journey dates.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for choosing us.