You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you help me to book a flight ticket from IAH to MSP?

ASSISTANT: When are you planning to make your journey?

USER: My travel dates are 16 to 18 of May.

ASSISTANT: Do you need any flag stop in between journey?

USER: I need a connecting flight.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: No.

ASSISTANT: May I know your name please?

USER: Emily Nelson here.

ASSISTANT: No flights found as per your preferences at the moment.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.