You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Eric Martin here. Could you book my ticket in a connecting flight?

ASSISTANT: I am happy to help you, please provide your journey dates.

USER: I want to leave on Dec 31 and return on Jan 2.

ASSISTANT: Ok, may I know your airport codes to get a flight for you?

USER: I want to travel from ORD to PHX.

ASSISTANT: Do you have any class preferences?

USER: No, I want to return in the evening.

ASSISTANT: Sorry, there is no flight for you on your planned dates.

USER: No problem, thank you.

ASSISTANT: Thanks for reaching us.