You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I hand help to you?

USER: Katherine Hall here and I would like to visit Chicago for business trip, so can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: May I know your airport codes?

USER: Sure, I want to travel from IAH to ORD.

ASSISTANT: May I know your traveling journey dates?

USER: Sure, I am planning to go on 01/12 and please book a return ticket on 01/14.

ASSISTANT: Please wait for a whille.

USER: I will wait for your response.

ASSISTANT: As per your request there is a connecting flight in Delta airlines, is it ok for you? Sorry for the trouble, this is a direct flight Hall, can I proceed?

USER: Sorry, I am looking for a flight with single connection, can you please check for it?

ASSISTANT: Sorry, there is no connecting flight obtained when I checked in our data base.

USER: Oh! Anyway, I will choose another way to go there. Thank you for the information.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Welcome.