You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Susan Thomas. I want to book a ticket from PHX to DTW to meet my grandparents, can you help me in booking?

ASSISTANT: Sure, may I know on what dates you have planned to travel?

USER: I am departing on 04/14 and return on 04/17.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for approaching us.