You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Betty Martinez. While checking my recent reservation status I mistakenly cancelled my reservation and again I need booking from AUS to JFK, could you mind help me in booking?

ASSISTANT: On which dates you are planning to travel?

USER: I am planning to travel on 02/26 and want to return on 02/28.

ASSISTANT: Sorry, there is no flights available.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.