You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My name is Karen Garcia. I would like to travel from IAD to LGA, can you help me out please?

ASSISTANT: Sure, I am here to help you out. Please share me your trip dates.

USER: My preferable dates are from 06/07 to 06/09.

ASSISTANT: Sorry Karen, here I didn't find any fight in your route.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for reaching us.