You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ruth Garcia.

ASSISTANT: How may I help you?

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

ASSISTANT: Sure, please wait a minute. May I know your trip dates?

USER: My trip dates are from 06/28 to 06/30.

ASSISTANT: Sorry, there is no flight.

USER: It's ok, thank you.

ASSISTANT: Welcome.