You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jessica King.

ASSISTANT: King, how can I assist you?

USER: I want to book a ticket from PHX to DFW, can you help me?

ASSISTANT: Sure, can you please tell me your travel dates?

USER: My travel dates are 12/22 and 12/24.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry King, there are no flights available on your preferred dates.

USER: No problem, thanks for checking.

ASSISTANT: You are welcome and thank you for choosing us.