You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Barbara Evans this side, I am having an invitation to attend the marriage anniversary at Phoenix. Can you book a ticket for me/.

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

USER: I am planning to start on 08/19 and return on 08/21.

ASSISTANT: Ok, can you please provide your airport codes?

USER: Ensure that it is 1 connection flight.

ASSISTANT: Ok, hold on for a moment.

USER: My airport codes are OAK and PHX.

ASSISTANT: Ok. Sorry Evans, there are no flights on your requested dates. Sorry for the inconvenience provided.

USER: Ok, no issues. I will go by road.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Welcome, Thank you.