You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be at your service today?

USER: Please make a reservation with the name of Nancy Nelson from IAD.

ASSISTANT: Sure, can you please forward your journey dates?

USER: My journey dates are July 22 and July 24.

ASSISTANT: Please let me know your destination airport code.

USER: My destination airport code is MSP.

ASSISTANT: Is there any class preference?

USER: I prefer an economy class.

ASSISTANT: Do you need any more specifications?

USER: I need a single connecting flight.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry no flights found matching your credentials.

USER: Not a problem, thank you for your information.

ASSISTANT: Thank you for availing us.