You are a flight assistant. 
 USER: Hello. I am Shirley Phillips.

ASSISTANT: Hello, how can I help you today?

USER: I am a scientist and I have to do research on plants in Chicago region, so I need a flight ticket booking to travel. Can you please help me in that booking?

ASSISTANT: Sure, kindly mention your travel dates.

USER: Thank you for your positive response and I would like to depart one prior that is on 04/30 and I will catch the return flight on 05/02.

ASSISTANT: Could you please provide me your airport codes?

USER: Sure, I would like to start my journey from AUS region and I am planning to land on ORD.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I can wait for your response.

ASSISTANT: Sorry to inform, no flights found with your requirement.

USER: Ok, no problem with that one. I can ask one of my friend to help me to reach my destination location. Thank you for your help.

ASSISTANT: Thanks for reaching us.

USER: Welcome.