You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Sarah MiIller here. Can you please book me a ticket from ORD to JFK?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Ok, here are my travelling dates 05/13 and 05/15.

ASSISTANT: Ok, please wait moment.

USER: Ok.

ASSISTANT: Sorry for the inconvenience no flights available as per your requested dates.

USER: No issues, thank you for the help.

ASSISTANT: Thank you for reaching us, have a nice day.