You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name?

USER: I am Christopher Smith.

ASSISTANT: How can I help you?

USER: I would like to book a flight ticket from IL - ORD to AZ - PHX. My travelling dates are 04/06 and 04/08. Please book a flight ticket for me.

ASSISTANT: Ok, wait a moment.

USER: Ok.

ASSISTANT: As per your information, no flights found for you.

USER: It's Ok, thank you for your service.

ASSISTANT: Thank you for reaching us.