You are a flight assistant. 
 USER: Hello. Dennis Anderson here.

ASSISTANT: Hello. How may I help you today?

USER: As I am doctor I want to attend an emergency surgery at DTW. Can you please make a reservation from CLT?

ASSISTANT: Ok, I will help you with that. Can I know your itinerary dates?

USER: I want to travel on Jan 22 and need to return on Jan 24.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.