You are a flight assistant. 
 USER: Hello. I am Patrick Hall.

ASSISTANT: Hello, how may I help you?

USER: I am looking for a flight from IAH to DTW, can you help me out?

ASSISTANT: Sure, help me with the trip dates?

USER: My trip dates are from Jan 21st till Jan 23rd.

ASSISTANT: Do you have any preferences?

USER: I need my return flight in afternoon session.

ASSISTANT: Thank you for your details, we do not found any flights running in your specified routes.

USER: That's ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for reaching us.