You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: My name is Betty Martinez. I would like to travel from LAS to DCA. Can you please help me for ticket booking?

ASSISTANT: Sure, please share your travel dates?

USER: My trip dates are 03/23 and 03/25.

ASSISTANT: Sorry there is no flight available.

USER: It's ok. Thank you for your information.

ASSISTANT: Thanks for reaching us.