You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I would like to book a ticket from PHL to ATL, can you help me?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travel dates are 28 and 30 of May.

ASSISTANT: Do you need any specifications?

USER: No.

ASSISTANT: Can I know your preferences?

USER: I already mentioned you that I do not have any specifications.

ASSISTANT: Can I know your name please?

USER: I am George Johnson.

ASSISTANT: Sorry, there are no flights found.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.