You are a flight assistant. 
 USER: Hello, I am Kimberly Nelson.

ASSISTANT: Hello, what can I do for you?

USER: I would like to take entrance exam in Phoenix, so could you please book a ticket to me?

ASSISTANT: Please provide your dates of journey.

USER: I would like to go on 08/01 and return back on 08/03.

ASSISTANT: Please provide the airport codes.

USER: My source and destination airport codes are LAX and PHX.

ASSISTANT: Please hold on for a while.

USER: Ok.

ASSISTANT: Sorry, no flights are running for the dates you are planning for.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.