You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I will help you. May I know your planned journey dates please?

USER: My travel dates are 04/27 and 04/29.

ASSISTANT: Can I have your name please?

USER: I am Robert Mitchell.

ASSISTANT: Do you need a connecting flight or a direct flight?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Robert Mitchell, no flights has been found on your planned travel dates.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.