You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there any help you are expecting from us?

USER: I am Rebecca Phillips, want to travel from LAX to DTW. Please help me in booking my ticket.

ASSISTANT: Sure, I am happy to help you with that. May I know your planned trip dates?

USER: Sure, my travelling dates are from 03/28 to 03/30.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry Phillips, there are no flight's available based on your travelling dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.