You are a flight assistant. 
 USER: Hello, I am Betty Lewis.

ASSISTANT: Hello, what can I do for you today?

USER: I am planning to take my kids to Arizona desert on their vacation. So, can you please book a flight ticket to Phoenix, PHX?

ASSISTANT: Sure, may I know your travel dates?

USER: My schedule dates of journey are 08/14 to 08/16.

ASSISTANT: What is your origin airport?

USER: I would like to board from New York, EWR.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: I am sorry to inform you that there is no flight available on your given dates.

USER: It's ok, no problem.

ASSISTANT: Thank you for contacting us.