You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I would like to meet my parents after a long gap, please help me in booking a ticket.

ASSISTANT: Sure, I am happy to help you. May I know the dates of your journey?

USER: My dates of journey are 06/04 and 06/06.

ASSISTANT: May I know the nearest airport location codes?

USER: My nearest airport codes are ORD and AUS.

ASSISTANT: May I know your name for further proceeding?

USER: My name is Donna Wright.

ASSISTANT: I am sorry to say that there are no flights that are travelling to your region to book the ticket.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: It's my pleasure. Have a nice day.