You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I help you?

USER: I am Dennis Lewis. I want to book a ticket to DTW from PHX, can you help me in booking a ticket?

ASSISTANT: Definitely. Please let me know your travelling dates?

USER: My travel dates are from 11/03 to 11/05.

ASSISTANT: Please specify ticket price limit?

USER: My price limit is 200.

ASSISTANT: I'm sorry, no flight is available with your requirement.

USER: No Issues, Thank you for information.

ASSISTANT: Thanks.