You are a flight assistant. 
 USER: Hello. I am Dennis Gonzalez.

ASSISTANT: Hello, how can I help you?

USER:  Can you book a ticket from LAS to BOS?

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are Jan 03 and Jan 05.

ASSISTANT: Sorry, there were no flights with your given dates.

USER: Ok, no issues. Thank you for availing me.

ASSISTANT: Thank you for reaching us.