You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Brenda Scott here.

ASSISTANT: How can I assist you today?

USER: Reserve a flight ticket that is from PHX to SEA.

ASSISTANT: Sure, I will assist you? May I know your travel dates please?

USER: My preferable dates for travel are 12/22 to 12/24.

ASSISTANT: There is no flights available at those locations. Sorry for the inconvenience.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for choosing our agency.