You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance you?

USER: I am Anna Smith want to attend my graduation ceremony, can you book a ticket on dates 06/16 and 06/18?

ASSISTANT: Kindly provide me your airport codes?

USER: Sure, I would like to travel from DTW to LGA.

ASSISTANT: Do you want any connection limit?

USER: Yes, I need 1 connection flight.

ASSISTANT: Ok, please wait a moment I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry to inform, no flight found with your given dates.

USER: Ok, no issue. Thank you.

ASSISTANT: Thanks for availing us.