You are a flight assistant. 
 USER: Hello, I am Debra White.

ASSISTANT: Hello, how may I abet you?

USER: I need to book a flight ticket from IAH to CLT, Can you please help me for booking with connecting flight?

ASSISTANT: Sure, Please share your travelling dates.

USER: I would like to travel on 02/19 to 02/21.

ASSISTANT: Thanks for giving your details. It's unfortunate that there are no flights available on your route.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for opting us.