You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help you are looking for?

USER: I am Donna Wilson from Detriot. I have to go Phoenix next week, can you please book a flight ticket for me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please give me your airport codes?

USER: I want to take off from DTW and destination airport is PHX.

ASSISTANT: Ok, when do you want to travel?

USER: My departure date is 04/01 and book my return ticket also on 04/03.

ASSISTANT: Ok, please give me a minute.

USER: Ok.

ASSISTANT: Sorry to inform you, there is no flight found in the dates you have provided to us.

USER: Oh! It's ok no problem, I will go with another airline. Thank you for your service.

ASSISTANT: You are welcome. Thank you for reaching us.