You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name please?

USER: I am Jerry Young.

ASSISTANT: Yes Jerry, how can I help you?

USER: I need to attend my relatives marriage on dates of 03/16 and 03/18.

ASSISTANT: Please tell your airport codes?

USER: From MSP to LGA.

ASSISTANT: Sorry, no flights are available regarding your journey. Thank you and have a nice day.

USER: It's ok. Thank you.