You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michael Davis.

ASSISTANT: Yes, Davis which type of help you are looking from us?

USER: I want to book a flight ticket from IAD to DTW to meet my parents who are staying there from past 2 years.

ASSISTANT: Sure, can you please provide your travelling dates of your trip?

USER: Sure, my travelling dates are 04/05 and 04/07.

ASSISTANT: Ok, there are no flights that are travelling to your regions.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: Thank you for reaching us have a nice day.