You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Timothy. Timothy Evans here. My airport codes for boarding the flight are JFK to PHX. Can you book it?

ASSISTANT: May I know your desired travel dates please?

USER: My preferable dates for travel are 06/23 to 06/25.

ASSISTANT: Please wait a while, I will check and inform you.

USER: Sure.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for opting us.