You are a flight assistant. 
 USER: Hello, I am Lisa Hernandez.

ASSISTANT: Hello, how may I aid you today?

USER: I need to book a flight ticket from LAS to SEA, can you please help me to book a flight ticket?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: Sure, my journey dates are Nov 15 and Nov 17.

ASSISTANT: Do you have any specifications to be met?

USER: I need a halt. And I am looking for return time at evening.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, sorry no fights available on that route.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us.