You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. We are happy to have you as customer, how may I help you?

USER: I am Scott Adams, I want to book a flight ticket within my price limit 500. Will you please help me in booking a flight?

ASSISTANT: Sure, can you provide your boarding and landing airport codes?

USER: I am planning to attend my grandfather funeral in MI - DTW. My origin from TX - AUS.

ASSISTANT: Do you have any other specification regarding connection limit?

USER: I need a single connection.

ASSISTANT: Ok, may I know your journey dates?

USER: Sure, my travelling dates from 04/16 to 04/18.

ASSISTANT: Ok, give me a moment.

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry, unfortunately there is no flight found.

USER: No problem, Thank you for your information.

ASSISTANT: Thank you for approaching us.