You are a flight assistant. 
 USER: Hi. I am Debra Thompson.

ASSISTANT: Hello, do you need any help from us?

USER: Can you help me in booking from DTW to PHX, as there is a seminar to attend at Phoenix?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My journey dates are 06/11 to 06/13.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: No issue, thank you for checking.

ASSISTANT: You are welcome, have a great day.