You are a flight assistant. 
 USER: Hi. I am Dorothy KIng.

ASSISTANT: Hello, how may I guide you King?

USER: Can you help me in booking from IAH to IAD?

ASSISTANT: Ok, I will help you with that. Can you please let me know your dates of journey when you have planned?

USER: My travelling dates are 02/29 to 03/02.

ASSISTANT: Sorry King, I can not find any flights to your destination limit.

USER: No issue, thank you.

ASSISTANT: Most welcome.