You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to visit Houston for live music concert, can you please book me a ticket from ORD to IAH?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My preferable journey dates are from 03/14 to 03/16.

ASSISTANT: Please wait for a while.

USER: Sure, take your own time.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: May I know your good name please?

USER: My name is Karen Anderson.

ASSISTANT: Thank you.

USER: Thank you for providing information.