You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I would like to book a ticket from DTW to LAX, can you please help me out?

ASSISTANT: Sure, I will help you out. May I know your travelling dates please?

USER: I am travelling on these dates 01/29 and 01/31.

ASSISTANT: Sorry, there are no flights found.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us. May I know your name?

USER: I am Sandra Philips.

ASSISTANT: Thank you.