You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: Can you please help me with booking a flight ticket from Houston to St Paul to attend a family function?

ASSISTANT: Sure, I will help you with booking. May I know your good name?

USER: Thank you. My name is Steven Hill.

ASSISTANT: Please mention your source and destination airport codes?

USER: I will fly from IAH my nearest airport code to reach my destination MSP.

ASSISTANT: Do you want any halt in between your flight journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Please also share me your planned journey dates?

USER: My travelling dates are Apr 15 and Apr 17.

ASSISTANT: Do you have any other requirement related to booking?

USER: No, I do not have any other preferences.

ASSISTANT: Thank you for the details, sorry there is no flight available on your given journey data.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, we hope see you again.