You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planing to travel from MSP to Houston, can you please help me to book a ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are on Sept 23 and Sept 25.

ASSISTANT: Please share your landing airport code?

USER: I want to land at IAH.

ASSISTANT: Do you have any specifications?

USER: I need single connection. Can you please help me to find an economy class?

ASSISTANT: May I know your name?

USER: My name is Kimberly Hill.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found with your specifications.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you.