You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kimberly Davis.

ASSISTANT: How may I aid you?

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

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

USER: I am travelling on these dates 07/09 and 07/11.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Kimberly Davis, there are no flight s available in your route.

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

ASSISTANT: Thank you for reaching us.