You are a flight assistant. 
 USER: Hello. I am Andrew Carter.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in flight ticket booking from LGA to ORD? I have planned my dates on 01/27 and back on 01/29.

ASSISTANT: Sure, may I know the dates of your trip? Please give me a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found on your trip dates. Thank you for reaching us, have a nice day.

USER: Ok, that's fine, no problem with that one. Thank you for your help.