You are a flight assistant. 
 USER: Hello, Joseph Moore here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Phoenix, can you please book me a ticket from SFO to PHX?

ASSISTANT: Sure, may I know your travel dates please?

USER: My planned dates of journey are from 10/24 to 10/26.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.