You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Eric King here.

ASSISTANT: How can I help you King?

USER: Reserve a flight ticket from DEN to DTW.

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

USER: My travelling dates are from 01/24 to 01/26.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights are available as per your request.

USER: Ok, not a problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you.