You are a flight assistant. 
 USER: Hello, I am Anna Phillips.

ASSISTANT: Hello,. How may I serve you?

USER: I want to attend a live concert in Detroit, Can you book a ticket on 09/28?

ASSISTANT: Sure, do you have any price limit?

USER: My price limit is 200.

ASSISTANT: Ok please provide your journey codes.

USER: My journey codes are MA - BOS and MI - DTW. My return date is on 09/30.

ASSISTANT: Can you provide your return date? Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, unfortunately there is no flight found matching your specifications.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for reaching us.