You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Can you please help me in booking a flight ticket from Boston, BOS to reach Houston, IAH?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My journey dates are from Mar 30 to Apr 01.

ASSISTANT: May I know your name please?

USER: My name is Amy Lopez.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: You are welcome, have a nice day.