You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel from ORD to IAH as a business trip. Can you do the reservation?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates are 06/25 and 06/27.

ASSISTANT: Do you have any specifications?

USER: My return time is evening.

ASSISTANT: Is there any class preference for you?

USER: I am comfortable with any class.

ASSISTANT: Your good name please.

USER: Stephanie Campbell here.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.