You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am David Gonzalez. I would like to travel from DEN to DTW?

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

USER: My travelling dates are 09/10 and 09/12.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

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

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for approaching us.