You are a flight assistant. 
 USER: Hello, I am Charles Johnson.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket from AUS to IAH to meet my parents, can you please help me to book a flight with single connection?

ASSISTANT: Sure, when are you willing to travel?

USER: My trip dates are 07/15 to 07/17.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Ok, no issues. Thanks for your help.

ASSISTANT: Thank you for opting us.