You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I want to travel from DTW to DEN. Can you help me to book a flight ticket?

ASSISTANT: Sure, can you please share me with your dates of journey?

USER: I want to travel in the flight on Apr 26 and Apr 28.

ASSISTANT: May I know your name please?

USER: Mary Moore.

ASSISTANT: Are you looking for any other help from my side please?

USER: I am looking for a direct flight.

ASSISTANT: Ok, wait for a moment please?

USER: Ok, take your time.

ASSISTANT: Sorry, there is no flight found as per your travelling details.

USER: That's ok. Anyways, thank you.

ASSISTANT: You are welcome.