You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Linda Martin.

ASSISTANT: How can I help you?

USER: I am planning to book a ticket from MSP to IAD. Can you please help me out?

ASSISTANT: Please mention your travel dates.

USER: I am planning to travel on Sept 22 and return back on Sept 24.

ASSISTANT: Do you have any preferences?

USER: I am looking for a business class.

ASSISTANT:  Do you have any other preferences?

USER: I am looking for a normal cost airline.

ASSISTANT: Is there any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Sorry, I did not find any flights for you.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.