You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Stephanie Hernandez here.

ASSISTANT: What assistance do you need from us?

USER: I have planned my business trip in Chicago, can you please help me out with booking of a flight ticket?

ASSISTANT: Yes, I can check that for you.

USER: Thank you.

ASSISTANT: Could you please provide me your planned travel dates?

USER: Sure, my boarding is on 04/01 and please book my return ticket on 04/03.

ASSISTANT: May I know your preferred airport codes?

USER: I want to travel from DTW to ORD.

ASSISTANT: Ok, please give me a minute  to check the flight.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you, there are no flights available in the dates you have provided.

USER: Oh! So sad to hear. Anyway, I will choose another airlines to go there. Thank you for the information.

ASSISTANT: Ok, thank you for approaching us. Have a nice day.

USER: Welcome.