You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hi. How can I assist you?

USER: I am Ronald Garcia, can you help me to book a flight from JFK to DTW?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are 06/25 and 06/27.

ASSISTANT: Ok, wait a moment please.

USER: Ok, take your time.

ASSISTANT: Sorry, there are no flights available on your dates.

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

ASSISTANT: Thank you for approaching us.