You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Helen Martinez here.

ASSISTANT: How can I serve you?

USER: I would like to go for a 3 days trip to Detroit, MI - DTW. Can you hold a ticket for me?

ASSISTANT: Sure. May I know the travelling dates?

USER: I want to travel on 05/01 and 05/03. I want to start from Chicago, IL - ORD.

ASSISTANT: Do you have any specifications?

USER: Yes, my price limit is 500 with a connection.

ASSISTANT: There is a flight 1001 in Spirit airline matches to your data. Price 100 with a connection. Shall I proceed?

USER: Ok, please book it.

ASSISTANT: Ok, Your ticket is done. Thank you.

USER: Thanks for the help.