You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I  assist you?

USER: I am Carolyn Williams. I am fond of casinos, so I am making a trip to Las Vegas. I will fly there on LAS on 05/25. From DTW on 05/23.

ASSISTANT: Sure, could you help me with the journey details for booking? Ok, wait for a minute.

USER: Sure.

ASSISTANT: Sorry Carolyn, no flight's found on your details.

USER: Not a problem.

ASSISTANT: Thank you for contacting us.

USER: Thanks for your information.