You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me to book a flight ticket from PHL to CLT?

ASSISTANT: Can I have your journey dates?

USER: My travel dates are 05 to 07 of Feb.

ASSISTANT: Do you need any connection limit?

USER: I am ok with any connection limit.

ASSISTANT: Are there any other specifications?

USER: I prefer to return in the afternoon.

ASSISTANT: May I know your name?

USER: Donna Martin here.

ASSISTANT: There are no flights available on your routes.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for choosing us.