You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Karen Evans here. I want to reserve my ticket from CLT to HOU, can you please help me out?

ASSISTANT: Sure, I am perky to help you.

USER: Thank you.

ASSISTANT: May I know your travel dates?

USER: Sure, my planned dates of journey are from Feb, 15 to Feb, 17.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your class preference?

USER: No, I need a return time at morning.

ASSISTANT: Do you have any airline preference?

USER: No, I am ok with any airline preference.

ASSISTANT: Sorry, no flights are found on your desired routes.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us, have a great day.