You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in reserving a flight ticket to SEA from PHX?

ASSISTANT: Sure, I will help you. Can you please help me with your planned travel dates?

USER:  I want to travel on 12/28, and need to catch return flight on 12/30.

ASSISTANT: May I know your name please to proceed further?

USER: I am Jeffrey Brown.

ASSISTANT: Do you need a connecting flight?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Jeffrey Brown, no flights has been found on your planned travel dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.