You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what type of  service do you expect from our travel agency?

USER: I am very interested in trekking, so I would like to travel to Chicago to enjoy my holidays in Hills Park. Can you please help me in reserving a flight ticket to reach my destination?

ASSISTANT: Sure, our agency can help you in flight ticket booking.

USER: Thank you.

ASSISTANT: When you are preferable to travel to Chicago?

USER: I am planning to travel in the month of February, so the journey dates would be on 02/09 and later return back to my home town on 02/11.

ASSISTANT: Ok, can you please let me know the nearest airfield to your hometown?

USER: Sure, the source airport region is LAS which is in Las Vegas.

ASSISTANT: Ok, can you please provide the airfield of Chicago for better search?

USER: Sure, the destination airport code is ORD which is in Chicago.

ASSISTANT: Ok, could you please give me a couple of seconds while I am searching a flight? And I will get back to you.

USER: Sure, take your own time.

ASSISTANT: Is there any other requirements that you prefer?

USER: Yes, I need a non connecting flight in my journey due to long trip.

ASSISTANT: Sorry to inform you, there is no flight with your request.

USER: That's fine, not a problem with that one.

ASSISTANT: Can you please provide me your name for documentation purpose?

USER: Sure, my name is Kathleen Collins.

ASSISTANT: Ok, thank you for approaching us.

USER: Thank you for your quick response in helping us.

ASSISTANT: It's my pleasure to help you.